NEET Daily Practice Papers - Biology - Genetics
664 Questions/Answers
Theory of epigenesis'' was given by
Answer:
Explanation:
When one gene pair hides the effect of the other unit, this phenomenon is referred as
The diagram representing karyotype of a species is called
Larger sub-unit of ribosome is composed of how many rRNA molecules
CCA base sequence is present in which part of tRNA
Match List I and List II and select the answer using the code given below the lists: List I (Scientist) List II (Discovery) 1. Frederick Griffith Phenomenon of transformation 2. Gamow A sequence of 3 nucleotide codes for a single amino acid 3. Friedrich Miescter Isolated DNA for the first time
Match List I and List II and select the correct answer using the code given below in the lists: List I (Enzyme) List II (Enzyme function) 1 Ligase Joins short segments of DNA together 2. DNA polymerase Cuts DNA at specific DNA sequence 3. Helicase Breaks the hydrogen bonds between complementary pairs during DNA replication
Genetic transfer through viruses is called
The nitrogenous bases in DNA are
Which of the following types of RNA molecule can be described as soluble, relatively small and having a folded compact shape
If the sequence of bases in DNA is ATTCGATG, then the sequence of bases in its transcript will be
DNA has in it four different types of nucleotides. These are
DNA replication is
A unit composed of a sugar and base linked by β glycosidic bond is known as a
3-D structure of RNA is called
Central dogma means
Which of the following RNA carries information from DNA in protein synthesis
Methionine and formyl methionine are coded by
Which of the theory is concerned with crossing over
According to Operon theory, an operator gene combines with
Genetic code of nucleic acid depends upon
Circular DNA molecule occurs in
Normally all genes occur in pairs occupying position on the X chromosome and not on Y chromosome. This indicates that
The term ‘ge’ refers to
Which one of the following blood group systems is determined by genes on the X chromosome
Phenylketonuria (PKU) is an inherited disease which refers to
Freemartin is an example of
Conjoint twins are also known as
In a random mating population in equilibrium, which of the following brings about a change in gene frequency in a non-directional manner
Electroporation procedure involves
Which one of the following pairs is correctly matched: Ribosomal RNA
In DNA if 10% guanine is present, how much thymine is present
Which one of the following correctly represents the manner of replication of DNA
What function is performed by sigma factor and rho factor in the process of transcription
Which of the following is a sulphur containing amino acid
Which of the following is the correct sequence for protein synthesis
RNA polymerase is involved in
How many codes are blank
Triplet for inhibiting process of translation is
E.coli cells with a mutated z gene of the lac operon cannot grow in medium containing only lactose as the source energy because
DNA is found primarily
The one which is capable of self replication is
Which one of the following pair is correctly matched
Match the following and mark the correct option
Catalytic property of RNA was discovered by
A model that relates repetitive DNA sequences and their transcripts of regulation in eukaryotes was proposed by
Who among the following scientists developed cytochemical technique for the presence of DNA
Replication of DNA is in
DNA replication is aided by
If the DNA codons are ATG ATG ATG and a cytosine base is inserted at the beginning, which of the following will result
Adenine is 30% then what would be the % of guanine
Okazaki fragments are joined in correct sequence by
Ribozyme is
If the DNA strand has the nitrogenous base sequence ATTGCC, the mRNA will have
DNA is methylated at
Purines of DNA are represented by
A nucleoside differs from a nucleotide in not having
Watson and Crick are known for their discovery that DNA
If the base sequence in one polynucleotide series of DNA is G–C–A–T–G, what shall be the sequence in the replicated complementary strand
Phosphorus is present in
A boy is colour blind, in his two sisters one is colour blind and one is carrier (normal). Then who is colour blind in his family?
Arrangement of DNA has the triplet base sequence AAC GAC AGC GGC ACA AAA. Due to mutation, the first base only got deleted. Then the likely effect of this on the coding of the DNA segment is that
In order to determine whether variations of a character in a population were genetically controlled, the most appropriate procedure will be to
Knowing that albinism is determined by a recessive gene in man; presence of albinism in children born to a couple proves that
In Drosophila melanogaster, 3 pairs of autosomes and sex chromosomes of XO type give rise to a normal male in appearance. In man, 22 pairs of autosomes and XO type of sex chromosomes form
A normal woman whose father was albino marries a man who is albino. What proportion of normal and albino can be expected among their offsprings?
In man sometime during gametogenesis sex chromosomes are not separated themselves on account of which chromosome number becomes 45, 47 or 48. In this condition which of the following genotype and phenotype is correct?
Transition type of gene mutation is caused when
Euploidy is best explained by
Match list I with List II and select the correct answer using code given below. (Syndromes and Chromosomal abnormality)
The process of genetic mutation is
If gene exchange rate is 30% of the two linked genes, then the distance between these two genes is
The primary biological importance of sex in organisms is that it
Identical twins are produced when
Which of the following correctly defines a transgenic animal?
Each chromosome at the anaphase stage of a bone marrow cell in our body has
Primary source of allelic variation is
Which one of the following is a correct statement
In a trihybrid cross which plant will produce eight types of gametes
In order to find out the different types of gametes produced by a pea plant having the genotype AaBb, it should be crossed to a plant with the genotype
As a result of marriage of curly hair mother and straight hair father, 8 children are born. The ratio of curly and straight haired will be
A woman of blood group ‘O' presented a baby of blood group ‘O' which she claimed as her child. She brought a suit against a man of `AB' group as the father of the child. Which statement is correct as per your judgement?
A man with blood group ‘AB' marries a woman with ‘O' blood group. In this situation
Pure homozygous offsprings in a dihybrid cross in the F2 generation will be
Identify the following point mutations in mRNA : UAU ACC UAU to UAU AAC CUA and UUG CUA AUA to UUG CUG AUA
Initiating codon in eukaryotes is
The mule is a
A black dog heterozygous for the colour is crossed with white bitch, recessive homozygous. Progeny will show black to white offsprings in the ratio of
Recessive characters are expressed
Persons with the following syndrome have a tendency of tall structure, mental defects and a strong antisocial behaviour
The exchange of one part of a chromosome to the other part of same or another chromosome is called
A husband and wife have normal vision but fathers of both of them were colour blind. Probability of their first daughter to be colour blind is
When a cluster of genes shows linkage behaviour they
Read the assertion and reason carefully to mark the correct option out of the options given below: If both the assertion and the reason are true and the reason is a correct explanation of the assertion
Assertion : The uptake of DNA during transformation is an active, energy requiring process. Reason : Transformation occurs in only those bacteria, which possess the enzymatic machinery involved in the active uptake and recombination.
Assertion : Genetic code is universal. Reason : Genetic code is same for all organisms.
Assertion : Central dogma is the flow of information from DNA to mRNA and then decoding the information present in mRNA in the form of protein. Reason : In retroviruses, reverse of central dogma occurs.
Assertion : Cytoplasmic inheritance occurs only due to plasmagenes. Reason : Plasmagenes are restricted to only two cell organelles i.e., mitochondria and chloroplast.
Assertion : Regulator and operator genes are not associated with constitutive genes. Reason : Constitutive genes need not be repressed.
Assertion : Crossing over occurs in all four chromatids of homologous chromosome. Reason : One homologous chromosome is called maternal and other paternal.
In Pisum sativum there are 14 chromosomes. How may pairs with different chromosomal composition can be prepared?
When one or more genes are missing from middle part of chromosome, it is called
Gene controls
Smallest structure having the power of replicating itself is
The core of nucleosome is made up of
Nucleosome consists of
Diameter of each nucleosome is about
In between two nucleosomes, how many nucleotide pairs are present?
Nucleosomes are
Morgan was awarded Nobel Prize for
Satellite DNA is present in
Holandric genes are
Who invented the method of identification of nutrient characters in Neurospora crassa?
What are allosomes?
In which bacteria insulin gene was cloned?
Separation of the two chromatids of a chromosome takes place in mitosis during
The modern concept of gene is
"One gene one enzyme'' theory was proposed by
One functional unit of gene which specifies synthesis of one polypeptide is known as
Genes are chemically
When two genetic loci produce identical phenotypes in cis as well as in trans position, they are considered to be
In Mendelian monohybrid cross, phenotypic ratio in F2 is 3:1. How many types of gametes are formed in F1 generation?
In a dihybrid cross 80 plants are obtained. The ratio of homozygous and heterozygous shall be
In a monohybrid cross 120 plants are obtained. The ratio of homozygous and heterozygous shall be
If Mendel had studied the seven traits using a plant with 12 chromosomes instead of 14, in what way would his interpretation have been different?
When a heterozygous dominant is crossed with homozygous recessive than ratio of progeny will be
How many different types of genetically different gametes will be produced by a heterozygous plant having the genotype AABbCc?
When AABB and aabb are crossed, in F2 generation the ratio of AaBb will be
Blue flowered and white flowered plant on crossing gave progeny of blue and white flowered in the ratio of 60 : 40. What ratio of blue and white is expected if the blue flowered are self pollinated?
When a tall and red flowered individual is crossed with a dwarf and white flowered individual, phenotype in the progeny is dwarf and white. What will be the genotype of tall and red flowered individual?
Hybrid vigour is induced by
Mendel’s law of independent assortment is applicable for
If at a tall plant is crossed with a dwarf plant and obtained progeny is half tall and half dwarf plants. Then the genotype of progeny will be
A self-fertilizing trihybrid plant forms
In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTt genotype is crossed with a plant that is rrtt.
When a tall plant with rounded seeds (TTRR) is crossed with a dwarf plant with wrinkled seeds (ttrr), the F1 generation consists of tall plants with rounded seeds. How many types of gametes an F1 plant would produce?
If a cross is made between AA and aa, the nature of F1 progeny will be
Which of the following is considered as a recessive character of Mendel
Hybrid breakdown refers to the condition when offspring are physiologically inferior to the following generation
A double heterozygous tall plant with yellow colour (colour of cotyledon) is selfed the ratio of dwarf plants with green cotyledon is
Heterozygous purple flower is crossed with recessive white flower. The progeny has the ratio
Pure tall plants are crossed with pure dwarf plants. In the F1 generation all plants were tall. These tall plants of F1 generation were selfed and the ratio of tall to dwarf plants obtained was 3 : 1. This is called
Which plant is used as a model system in the study of plant genetic
Alleles are form of
Laws of Mendel are valid for
Mendel’s law of sagregation is applicable to
Which is the functional unit of inheritance
Character choosen by Mendel are located on how many chromosome
Mendel law is still true because
What is true for expressing recessive characters
Which one of the following operations with flowering plants would be most likely to produce the greatest number of variations in the offsprings
The colour of flower in pea is always linked with
Mendel was lucky, because
How many types of gametes are formed in F1 generation of Mendelian monohybrid cross?
Which of the following will produce a 9:7 ratio in F2 generation?
For a dihybrid cross AaBb × AaBb, how many offspring will be homozygous for both traits?
If a trait shows blending inheritance, what will be its F2 ratio?
Who gave the term gene?
Which of following is not a dominant character in pea plant?
Mendel's third law is
The genes, which are confined to differential region of Y chromosome only, are called
Usually the recessive character is expressed only when present in a double recessive condition. However, a single recessive gene can express itself in human beings when the gene is present on
Two allelic genes are located on
In human beings, the colour of skin is controlled by
Which of the following is genetically dominant in man
Which of the following is an inherited trait in man
At what temperature the blood is stored in bottles
In how much maximum period the stored blood should be transfused
The stored blood must be free from
To store blood some anticoagulant is added. It can be
If a certain patient with blood group B requires immediate blood transfusion, the following type can be given to him
Inheritance of ABO blood group system is an example of
Genotype of blood group ‘A' will be
Blood group ‘B' will have alleles
A person with blood group ‘A' can be given blood of which group
Antisera used to detect Rh blood group
In case of disputed parentage, the blood group analysis of the mother, child and alleged father can
Who was the scientist to introduce ABO blood groups
During serological test in which anti–human serum is mixed with blood of another animal, blood of which animal gives the thickest precipitate
Mating among close relations is referred
Separation of the two chromatids of a chromosome takes place in mitosis during
The modern concept of gene is
One functional unit of gene which specifies synthesis of one polypeptide is known as
Genes are chemically
The terms cistron, recon and muton were proposed by
An inherited factor that determines a biological characteristic of an organism is called
Genes are
The eukaryotic chromosomes are made up of
A characteristic showing continuous variation is controlled by a
A pure breeding pea plant with the dominant phenotype of character A and recessive phenotype of character B was crossed with another pure breeding plant with the recessive phenotype of A and dominant phenotype of character B. A offspring of this cross was crossed with a homozygous recessive for both the characters – A and B. The following results are obtained 22 were phenotypically dominant for A and recessive for B, 4 were dominant for both A and B, 4 were recessive for both A and B, 24 were recessive for A and dominant for B. These results show that:
Genes which are located on the same chromosome are
In split genes, the coding sequences are called
Which one of the following is true
The bacterial genome refers to the total number of genes located upon a or The term 'genome' refers to the total number of genes combined in a
Different types of chromosomes can be recognised by the position of the following separating the two arms
One gene one enzyme concept means
A gene is made up of
The theory of jumping genes was propounded by or Noble prize for the concept of jumping gene was given to
The term 'gene' was coined by
A discrete multiprotein structure on the chromosome which contains enzymes for DNA duplication is called as
If the gene exchange rate is 30% of the two linked genes, then the distance between these two genes is
The primary biological importance of sex in organisms is that it
Identical twins are produced when
Which of the following correctly defines a transgenic animal
Each chromosome at the anaphase stage of a bone marrow cell in our body has
Primary source of allelic variation is
"Bt" in "Bt-cotton" indicates that it is a genetically modified organism produced through biotechnology
In a trihybrid cross which plant will produce eight types of gametes
In order to find out the different types of gametes produced by a pea plant having the genotype AaBb, it should be crossed to a plant with the genotype
As a result of marriage of curly hair mother and straight hair father, 8 children are born. The ratio of curly and straight haired will be
A woman of blood group ‘O' presented a baby of blood group ‘O' which she claimed as her child. She brought a suit against a man of 'AB' group as the father of the child. Which statement is correct as per your judgement
A man with blood group ‘AB' marries a woman with ‘O' blood group. In this situation
Pure homozygous offsprings in a dihybrid cross in the F2 generation will be
Identify the following point mutations in mRNA: UAU ACC UAU to UAU AAC CUA and UUG CUA AUA to UUG CUG AUA
Initiating codon in eukaryotes is
The mule is a
A black dog heterozygous for the colour is crossed with white bitch, recessive homozygous. Progeny will show black to white offsprings in the ratio of
Recessive characters are expressed
Persons with the following syndrome have a tendency of tall structure, mental defects and a strong antisocial behaviour
The exchange of one part of a chromosome to the other part of same or another chromosome is called
Which one of the following is not correct about t RNA?
c-DNA can be formed by
Which of the following is not correct: (a) T/A = 1 (b) A+T = G+C (c) A+G = C+T (d) None of these
Which is not correctly matched: (a) Lipase - Hydrolysis of fats (b) Isomerases - joining of similar substrate and management of substrate (c) Polymerase - Chain elongation (d) DNA ligase - Breaks DNA strand into two segments
In a mutational event, when adenine is replaced by guanine, it is a case of
During transcription, if the nucleotide sequence of the DNA strand that is being coded is ATACG; then the nucleotide sequence in the mRNA would be
During replication of a bacterial chromosome DNA synthesis starts from a replication origin site and
Which form of RNA has a structure resembling clover leaf?
A given double stranded DNA molecule is 1,00,000 base pairs long. The length of this DNA molecule will be
DNA repairing is done by
Transforming principle in Griffith’s experiment was DNA. It was discovered by
Synthesis of m–RNA is
The bacterium used in Griffith’s experiment was
Which RNA carries information from DNA in protein synthesis?
New strand on a DNA template is initiated by
During DNA replication, the strands separate by
In a given DNA segment the number of nucleotides of guanine is 75 and those of thymine is 75. The total number of nucleotides in the segment will be
There are special proteins that help to open up DNA double helix in front of the replication fork. These protein are
In a hair pin model of RNA which nitrogen base is present at the short end
Which of the following is not found in DNA?
Which of the following is not related to chromosomal aberration?
Point mutation is a change which involves
The frequency of a mutant gene in a population is expected to increase, if the gene is
Albinism is a congenital disorder resulting from the lack of the enzyme
Sometimes chromosome number increase or decrease due to
A person who has 47 chromosomes due to an extra X chromosome is affected by
Mutations are responsible for
Edward syndrome is on account of .......
The cause of Turner's syndrome in man is
In man the mutation disease ‘Aniridia' (Congenital absence of iris) occurs due to
Phenyketonuria is a genetic disorder of
Height is
Which one of the following is not a mutagen
Mutation rates are affected by
A mutation is most likely to have a selective advantage in evolution if
In Down's syndrome (Mongolism) each cell has how many chromosomes
Which of the following is not X-linked recessive
Gynaecomastia is the symptom of
Which of the following is the main category of mutation
In human beings, multiple genes are involved in the inheritance of
A normal metaphase chromosome with a medial centromere is called?
The males of grasshoppers and moths possess two sets of autosomes and:
Relative morphologies of chromosomes of an individual indicate his/her:
A genome is the:
Jumping genes are now known as:
Number of autosomes in a normal female is:
The point at which the polytene chromosomes appear to be attached together is known as:
Balbiani discovered special type of chromosome from the salivary gland of Chironomus larva which are recognized by the presence of:
The number of autosomes in man is:
Polytene or giant chromosomes are found in:
Lampbrush chromosomes are visible:
In chromosomes, the material controlling heredity is:
Total number of autosomes in fertilized egg of man is:
Lampbrush chromosomes are found inside:
In man, sperms contain autosomes and:
Drosophila melanogastor has 8 chromosomes in somatic cell. How many linkage groups will be there?
Two sister chromatids are attached with:
Balbiani rings are present in:
Chromosomes can be stained with:
Father of human genetics is:
Chromosomes were seen first time by
Genes located at the same locus of chromosomes are called
Jumping genes are found in
An auxotroph is
The person who discovered 'Y' chromosomes was
"Nu body" was shown by
"Cytochimeras" means
Pleotropic character represent that quality of gene which is called
In Pisum sativum there are 14 chromosomes. How may pairs with different chromosomal composition can be prepared
When one or more genes are missing from middle part of chromosome, it is called
Gene controls
Smallest structure having the power of replicating itself is
The core of nucleosome is made up of
Nucleosome consists of
Diameter of each nucleosome is about
In between two nucleosomes, how many nucleotide pairs are present
Nucleosomes are
Morgan was awarded Nobel Prize for
Satellite DNA is present in
Holandric genes are
A pure breeding pea plant with the dominant phenotype of character A and recessive phenotype of character B was crossed with another pure breeding plant with the recessive phenotype of A and dominant phenotype of character B. A offspring of this cross was crossed with a homozygous recessive for both the characters – A and B. The following results are obtained 22 were phenotypically dominant for A and recessive for B. 4 were phenotypically dominant for both A and B. 4 were phenotypically recessive for both A and B. 24 were phenotypically recessive for A and dominant for B. These results show that
Genes which are located on the same chromosome are
In split genes, the coding sequences are called
Which one of the following true
The bacterial genome refers to the total number of genes located upon a or The term 'genome' refers to the total number of genes combined in a
Different types of chromosomes can be recognised by the position of the following separating the two arms
One gene one enzyme concept means
A gene is made up of
The theory of jumping genes was propounded by or Noble prize for the concept of jumping gene was given to
The term 'gene' was coined by
A discrete multiprotein structure on the chromosome which contains enzymes for DNA duplication is called as
Substances known as 'heredity carriers' are
The genes are in the form of
Genetically active area of chromosome is called
Who postulated the 'Chromosome Theory of Inheritance'
Which one of the following histone is not present in the core particle of nucleosome
Octamer which form complex unit with DNA is called
Nucleosomes are bounded by
Core particle of nucleosome is composed of how many histones
A normal spontaneous rate for a single gene is one mutation in every……replication
Point mutation is a change which involves
The frequency of a mutant gene in a population is expected to increase, if the gene is
Albinism is a congenital disorder resulting from the lack of the enzyme
Sometimes chromosome number increase or decrease due to
A person who has 47 chromosomes due to an extra X chromosome is affected by
Mutations are responsible for
Edward syndrome is on account of .......
The cause of Turner's syndrome in man is
In man the mutation disease ‘Aniridia' (Congenital absence of iris) occurs due to
Phenyketonuria is a genetic disorder of
Height is
Which one of the following is not a mutagen
Mutation rates are affected by
A mutation is most likely to have a selective advantage in evolution if
In Down's syndrome (Mongolism) each cell has how many chromosomes
Which of the following is not X-linked recessive
Gynaecomastia is the symptom of
Which of the following is the main category of mutation
In human beings, multiple genes are involved in the inheritance of
The formation of multivalents at meiosis in diploid organism is due to
The most striking example of point mutation is found in a disease called
An abnormal human male phenotype involving an extra X chromosome (XXY) is a case of
Which of the following is not related to chromosomal aberration
Point mutation is a change which involves
The frequency of a mutant gene in a population is expected to increase, if the gene is
Albinism is a congenital disorder resulting from the lack of the enzyme
Sometimes chromosome number increase or decrease due to
A person who has 47 chromosomes due to an extra X chromosome is affected by
Mutations are responsible for
Edward syndrome is on account of .......
The cause of Turner's syndrome in man is
In man the mutation disease ‘Aniridia' (Congenital absence of iris) occurs due to
Phenyketonuria is a genetic disorder of
Height is
Which one of the following is not a mutagen
Mutation rates are affected by
A mutation is most likely to have a selective advantage in evolution if
In Down's syndrome (Mongolism) each cell has how many chromosomes
Which of the following is not X-linked recessive
Gynaecomastia is the symptom of
A fruit fly is heterozygous for sex-linked genes when mated with normal female fruit fly, the male specific chromosome will enter egg cell in the proportion:
In which of the following colourblindness is inherited?
Persons who are colour blind cannot distinguish:
Which of the following is a sex-linked character?
Expected children of a blue-eyed (recessive) woman and brown-eyed (dominant) man who had a blue-eyed mother are likely to be:
Gene for colourblindness is located on:
A sex linked recessive gene C produces red green colour blindness in humans. A normal woman whose father was colourblind marries a colourblind man. Of all the girls born to these parents what percentage is expected to be colourblind?
A diseased man marries a normal woman. They get three daughters and five sons. All the daughters were diseased and sons were normal. The gene of this disease is:
Pattern baldness, moustaches and beard in human males are examples of:
One of the genes present exclusively on the X-chromosome in humans is concerned with:
One of the following is not true to haemophilia:
What are all the chances of colour blind daughter and sons being born in a marriage of normal man marrying a normal woman, whose father was colour blind?
A normal woman, whose father was colour-blind is married to a normal man. The sons would be:
If a normal women marries a colourblind man:
Which one of the following is a genetically transmitted character?
The most common type of haemophilia results from the congenital absence of:
Haemophilia is a:
A marriage between normal visioned man and colourblind woman will produce which of the following types of offsprings?
Sex influenced characters are due to:
Which of the following is not a hereditary disease?
Who invented the method of identification of nutrient characters in Neurospora crassa?
What are allosomes?
In which bacteria was the insulin gene cloned?
Separation of the two chromatids of a chromosome takes place in mitosis during which phase?
The modern concept of gene is?
"One gene one enzyme" theory was proposed by?
One functional unit of gene which specifies synthesis of one polypeptide is known as?
Genes are chemically?
The terms cistron, recon, and muton were proposed by?
An inherited factor that determines a biological characteristic of an organism is called?
Genes are?
The eukaryotic chromosomes are made up of?
A characteristic showing continuous variation is controlled by a?
A pure breeding pea plant with the dominant phenotype of character A and recessive phenotype of character B was crossed with another purebreeding plant with the recessive phenotype of A and dominant phenotype of B. A offspring of this cross was crossed with a homozygous recessive for both the characters – A and B. The following results are obtained: 22 dominant A recessive B; 4 dominant both; 4 recessive both; 24 recessive A dominant B. These results show that?
Genes which are located on the same chromosome are?
In split genes, the coding sequences are called?
Which one of the following is true?
The bacterial genome refers to the total number of genes located upon a ___ or The term 'genome' refers to the total number of genes combined in a ___?
Different types of chromosomes can be recognised by the position of the following separating the two arms?
One gene one enzyme concept means?
Which of the following is not the types of blood groups or blood factors?
Blood group ‘O’ has
If the foetus is Rh+ and mother is Rh– then
Which of the following substances, if introduced into the blood stream, would cause coagulation of blood at the site of its introduction?
Philadelphia chromosome is found in the patient suffering from
Number of sex chromosomes is normal in
Mating between two individuals differing in genotype to produce genetic variation is called
The gene which increases the frequency of mutation in other gene is referred to as
If an albino man marries with a normal woman and 50 offsprings are albino and 50 are normal, the woman is
If mother and father both are without pigments (albinism), then
Traits controlled by genes located on autosomes are said to be
Which one in man is a wholly genetic trait?
Mongolism syndrome is caused by
To be evolutionary successful, a mutation must be
In man, albinism is due to non-synthesis of melanin in the absence of
The reason why some mutations which are harmful do not get eliminated from the gene pool, is that
An abnormal male child is born to normal parents. This child shows a short neck, stubby hands, slanting eyes, permanently open mouth with projecting upper lip and short stature. This abnormality can be attributed to
The reduction of one pair of chromosome in human is due to
Mongoloid condition is related to or In mongolism a patient shows
Which of the following is a genetic disease?
What is the function of chromosomes in heredity?
What is the twenty third pair of chromosomes in man known as?
Which technique is used for detailed study of human chromosomes?
The chromosomes as thread-like structures in the nucleus were first described by whom?
What determines the somatic characters in humans?
The linkage map of X-chromosome of fruit fly has 66 units between yellow body gene (y) and bobbed hair gene (b). What is the expected recombination frequency?
Chromosome number is typically fixed for which biological classification?
Which branch of science links heredity with environment?
In man, sex-linked characters are mainly transmitted through which chromosome?
A male human is heterozygous for autosomal genes A and B and hemizygous for gene h. What proportion of his sperms will be abh?
The recessive genes located on X-chromosome in humans are always:
What is the estimated total number of nitrogenous bases in human genome?
To calculate map distance of genes on a chromosome, what must be known?
At a locus, allele 'A' frequency is 0.6 and 'a' is 0.4. What is the frequency of heterozygotes in equilibrium?
Centromere is required for what function?
Telomerase is an enzyme which is a:
If percentage recombination between genes A & B = 9%, genes A & C = 17%, B & C = 26%, what is the gene arrangement?
Chromosome complement with 2n-1 is called:
A gene is said to be dominant if:
Chromosomes were seen first time by:
The condensation of the chromosomes are maximal with visible centromeres at which phase of cell cycle?
A normal metaphase chromosome with a midial centromere is:
The males of grasshoppers and moths posses two sets of autosomes and:
Relative morphologies of chromosomes of an individual indicate his/her:
A genome is the:
Jumping genes are now known as:
Number of autosomes in a normal female is:
The point at which the polytene chromosomes appear to be attached together is known as:
Balbiani discovered special type of chromosome from the salivary gland of Chironomus larva which are recognized by the presence of:
The number of autosomes in man is:
Polytene or giant chromosomes are found in:
Lampbrush chromosomes are visible:
In chromosomes, the material controlling heredity is:
Total number of autosomes in fertilized egg of man is:
Lampbrush chromosomes are found inside:
In man, sperms contain autosomes and:
Drosophila melanogastor has 8 chromosomes in somatic cell. How many linkage groups will be there?
Two sister chromatids are attatched with:
Balbiani rings are present in:
Chromosomes can be stained with:
Which one of the following is not a mutagen?
Mutation rates are affected by
A mutation is most likely to have a selective advantage in evolution if
In Down's syndrome (Mongolism) each cell has how many chromosomes?
Which of the following is not X-linked recessive?
Gynaecomastia is the symptom of
Which of the following is the main category of mutation?
In human beings, multiple genes are involved in the inheritance of
The formation of multivalents at meiosis in diploid organism is due to
Mental retardation in man, associated with sex chromosomal abnormality is usually due to
The reason of fault in gene duplication is
If haploid chromosome number in a cell is 12. The monosomic number will be
Normally DNA molecule has A-T, G-C pairing. However, these bases can exist in alternative valency status, owing to rearrangements called
Who reported that Down’s syndrome is due to extra 21st chromosome?
Mutation caused by a mutagen is
Discontinuous variations are
Epicanthus is the symptom of
Alkaptonuria is caused due to
A person may have one gene for normal haemoglobin and one gene for sickle cell haemoglobin. This heterozygous condition is called
If a diploid cell is treated with colchicine, then it becomes
Genes are chemically
The terms cistron, recon and muton were proposed by
An inherited factor that determines a biological characteristic of an organism is called
Genes are
The eukaryotic chromosomes are made up of
A characteristic showing continuous variation is controlled by a
A pure breeding pea plant with the dominant phenotype of character A and recessive phenotype of character B was crossed with another pure breeding plant with the recessive phenotype of A and dominant phenotype of character B. A offspring of this cross was crossed with a homozygous recessive for both the characters – A and B. The following results are obtained 22 were phenotypically dominant for A and recessive for B. 4 were phenotypically dominant for both A and B. 4 were phenotypically recessive for both A and B. 24 were phenotypically recessive for A and dominant for B. These results show that
Genes which are located on the same chromosome are
In split genes, the coding sequences are called
Which one of the following true
The bacterial genome refers to the total number of genes located upon a or The term 'genome' refers to the total number of genes combined in a
Different types of chromosomes can be recognised by the position of the following separating the two arms
One gene one enzyme concept means
A gene is made up of
The theory of jumping genes was propounded by or Nobel prize for the concept of jumping gene was given to
The term 'gene' was coined by
A discrete multiprotein structure on the chromosome which contains enzymes for DNA duplication is called as
Substances known as 'heredity carriers' are
The genes are in the form of
Genetically active area of chromosome is called
Even though a donor X and a recipient Y belongs to the same blood group, transfusion of blood leads to agglutination. This is because X is ____ and Y is ____.
A patient has type ‘A' blood, he needs blood transfusion. Type ‘A’ blood is not available, which of the following blood types could be substituted without causing harm to the patient?
Which blood group can be given to patients of any blood group?
Rh factor is concerned with
Who discovered Rh factor?
If one parent has blood group A and the other parent has blood group B, the offsprings have which blood group?
The problem due to Rh− factor arises when the blood two (Rh+ and Rh−) mix up
Which of the following are most abundant types of antibodies?
When dominant and recessive alleles express themselves together, it is called
In erythroblastosis foetalis, which factors of the mother pass through placenta into the foetus?
Which one of the following is hereditary character of blood?
You are required to draw blood from a patient and to keep it in a test tube for analysis of blood corpuscles and plasma. Which of them will you NOT use for the purpose?
A man with blood group B marries a woman with blood group A and their first child is having blood group B. What is the genotype of child?
One of the following is not the types of blood groups or blood factors:
Blood group ‘O’ has
If the foetus is Rh+ and mother is Rh− then
Which of the following substances, if introduced into the blood stream, would cause coagulation of blood at the site of its introduction?
'Philadelphia chromosome' is found in the patient suffering from
Number of sex chromosomes is normal in
Mating between two individuals differing in genotype to produce genetic variation is called
A patient has type ‘A' blood, he needs blood transfusion. Type ‘A’ blood is not available, which of the following blood types could be substituted without causing harm to the patient?
Which blood group can be given to patients of any blood group?
Rh factor is concerned with
Who discovered Rh factor?
If one parent has blood group A and the other parent has blood group B, the offsprings have which blood group?
The problem due to Rh– factor arises when the blood two (Rh+ and Rh–) mix up
Which of the following are most abundant types of antibodies?
When dominant and recessive alleles express themselves together, it is called
In erythroblastosis foetalis, which factors of the mother pass through placenta into the foetus?
Which one of the following is hereditary character of blood?
You are required to draw blood from a patient and to keep it in a test tube for analysis of blood corpuscles and plasma. You are also provided with the following four types of test tubes. Which of them will you not use for the purpose.
A man with blood group B marries a women with blood group A and their first child is having blood group B. What is the genotype of child?
One of the following is not the types of blood groups or blood factors
Blood group ‘O’ has
If the foetus is Rh+ and mother is Rh– then
Which of the following substances, if introduced into the blood stream, would cause coagulation of blood at the site of its introduction?
‘Philadelphia chromosome' is found in the patient suffering from
Number of sex chromosomes is normal in
Mating between two individuals differing in genotype to produce genetic variation is called
The gene which increases the frequency of mutation in other gene is referred to as
The modern concept of gene is
"One gene one enzyme'' theory was proposed by
One functional unit of gene which specifies synthesis of one polypeptide is known as
Genes are chemically
The terms cistron, recon and muton were proposed by
An inherited factor that determines a biological characteristic of an organism is called
Genes are
The eukaryotic chromosomes are made up of
A characteristic showing continuous variation is controlled by a
A pure breeding pea plant with the dominant phenotype of character A and recessive phenotype of character B was crossed with another pure breeding plant with the recessive phenotype of A and dominant phenotype of character B. A offspring of this cross was crossed with a homozygous recessive for both the characters – A and B. The following results are obtained 22 were phenotypically dominant for A and recessive for B. 4 were phenotypically dominant for both A and B. 4 were phenotypically recessive for both A and B. 24 were phenotypically recessive for A and dominant for B. These results show that
Genes which are located on the same chromosome are
In split genes, the coding sequences are called
Which one of the following true
The bacterial genome refers to the total number of genes located upon a or The term 'genome' refers to the total number of genes combined in a
Different types of chromosomes can be recognised by the position of the following separating the two arms
One gene one enzyme concept means
A gene is made up of
The theory of jumping genes was propounded by or Noble prize for the concept of jumping gene was given to
The term 'gene' was coined by
A discrete multiprotein structure on the chromosome which contains enzymes for DNA duplication is called as
A person may have one gene for normal haemoglobin and one gene for sickle cell haemoglobin. This heterozygous condition is called:
If a diploid cell is treated with colchicine, then it becomes
Which one of the following mutation partially or fully reverses the harmful effects of previous mutation
Polydactyly in man is due to
The number of chromosomes in Klinefelter’s syndrome is
Philadelphia chromosome is
Which pair of chromosomes is concerned with Down's syndrome
The condition in which there are more than two complete set of chromosome is called
Down’s syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder
Monosomy and trisomy can be represented as
Given below is the representation of a kind of chromosomal mutation What is the kind of mutation represented
Which is correct about white tiger
A recessive mutant is one which
Frequency of Down’s syndrome increases when the maternal age is
The amino acid substituted in sickle cell anaemia is
Phenylketonuria is a genetic disorder due to a defect in metabolism of the following.
Turner’s syndrome is an example of
In man, which of the following genotypes and phenotypes may be the correct result of aneuploidy in sex chromosomes
The cri-du-chat" syndrome is caused by change in chromosome structure involving
Somaclonal variation appears in
A pure breeding pea plant with the dominant phenotype of character A and recessive phenotype of character B was crossed with another pure breeding plant with the recessive phenotype of A and dominant phenotype of character B. An offspring of this cross was crossed with homozygous recessive for both the characters – A and B. The following results are obtained: 22 were phenotypically dominant for A and recessive for B, 4 were phenotypically dominant for both A and B, 4 were phenotypically recessive for both A and B, 24 were phenotypically recessive for A and dominant for B. These results show that
Genes which are located on the same chromosome are
In split genes, the coding sequences are called
Which one of the following is true?
The bacterial genome refers to the total number of genes located upon a or The term 'genome' refers to the total number of genes combined in a
Different types of chromosomes can be recognised by the position of the following separating the two arms
One gene one enzyme concept means
A gene is made up of
The theory of jumping genes was propounded by or Nobel prize for the concept of jumping gene was given to
The term 'gene' was coined by
A discrete multiprotein structure on the chromosome which contains enzymes for DNA duplication is called as
Substances known as 'heredity carriers' are
The genes are in the form of
Genetically active area of chromosome is called
Who postulated the 'Chromosome Theory of Inheritance'?
Which one of the following histones is not present in the core particle of nucleosome
Octamer which form complex unit with DNA is called
Nucleosomes are bounded by
Core particle of nucleosome is composed of how many histones
A normal spontaneous rate for a single gene is one mutation in every……replication
Which of the following is not found in DNA: (a) Adenine (b) Cytosine (c) Uracil (d) Thymine
Choose the correct statement about the direction of DNA strand: (a) 5’ 3’ takes place on template strand (b) 3’ 5’ takes place on new strand (c) 5’ 3’ takes place on leading strand (d) None of these
Which one of the following hydrolyses internal phosphodiester bonds in a polynucleotide chain: (a) Lipase (b) Exonuclease (c) Endonuclease (d) Protease
Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by (a) (Base-sugar-phosphate)n (b) Base-sugar-OH (c) Base-sugar-phosphate (d) Sugar-phosphate
Which one of the following makes use of RNA as a template to synthesize DNA: (a) Reverse transcriptase (b) DNA dependant RNA polymerase (c) DNA polymerase (d) RNA polymerase
Which is the hereditary material in bacteria: (a) Nucleic acid (b) Nucleic acid and cytoplasm (c) Nucleic acid and Histone (d) None of these
Unit of nucleic acid is: (a) Nucleotide (b) Nucleoside (c) Nucleic acid (d) All
Messenger RNA is produced in: (a) Nucleus (b) Golgi apparatus (c) Endoplasmic reticulum (d) Ribosomes
Which is soluble RNA: (a) hnRNA (b) rRNA (c) mRNA (d) tRNA
Genetic information transfer nucleus to cytoplasm by: (a) DNA (b) RNA (c) Lysosome (d) All
Supercoiled DNA can be traced in: (a) Prokaryotes and eukaryotes (b) Eukaryotes only (c) Prokaryotes only (d) None of these
DNA is double helix and: (a) Complementary and parallel (b) Complementary and antiparallel (c) Without super coils (d) Always circular
Degeneration of DNA after heating can be studied by comparing: (a) A:T ratio (b) G:C ratio (c) Sugar:Phosphate (d) Number of nucleotides
What is Okazaki segment: (a) DNA segment concerning recombination (b) Nucleotide chain segment formed during transcription (c) Nucleotide chain formed during DNA duplication (d) Segment of gene responsible for recombination
Complementary DNA (cDNA) is complementary to: (a) mRNA (b) tRNA (c) rRNA (d) None of the above
The function of tRNA is: (a) Production of mRNA (b) Production of ribosomes (c) Production of microsomes (d) Selection of amino acids
What are informosomes: (a) They are special types of tRNA (b) They are more stable forms of eukaryotic mRNA (c) They are eukaryotic rRNA (d) Both (b) and (c)
Heterogenous nuclear RNA: (a) Has lesser number of nucleotides (b) Has at least 50 nucleotides (c) Has about 100 nucleotides (d) Has about 200 or more nucleotides
Larger sub-unit of ribosome is composed of how many rRNA molecules: (a) One (b) Two (c) Three (d) Four
The contribution of cytoplasmic DNA in cells to total DNA is: (a) 1 to 5% (b) 45 to 50% (c) 65 to 75% (d) 95 to 99%
Who invented the method of identification of nutrient characters in Neurospora crassa?
What are allosomes?
In which bacteria insulin gene was cloned?
Separation of the two chromatids of a chromosome takes place in mitosis during which phase?
The modern concept of gene is
"One gene one enzyme" theory was proposed by
One functional unit of gene which specifies synthesis of one polypeptide is known as
Genes are chemically
The terms cistron, recon and muton were proposed by
An inherited factor that determines a biological characteristic of an organism is called
Genes are
The eukaryotic chromosomes are made up of
A characteristic showing continuous variation is controlled by a
A pure breeding pea plant with the dominant phenotype of character A and recessive phenotype of character B was crossed with another pure breeding plant with the recessive phenotype of A and dominant phenotype of character B. A offspring of this cross was crossed with a homozygous recessive for both the characters – A and B. The following results are obtained 22 were phenotypically dominant for A and recessive for B. 4 were phenotypically dominant for both A and B. 4 were phenotypically recessive for both A and B. 24 were phenotypically recessive for A and dominant for B. These results show that
Genes which are located on the same chromosome are
In split genes, the coding sequences are called
Which one of the following true
The bacterial genome refers to the total number of genes located upon a or The term 'genome' refers to the total number of genes combined in a
Different types of chromosomes can be recognised by the position of the following separating the two arms
One gene one enzyme concept means
The transfer of protein from electrophoretic gel to nitrocellulose membrane is known as
The term genetic engineering is used for
DNA fingerprinting refers to
Restriction endonucleases
Restriction endonuclease, an enzyme used in Genetic Engineering is employed for
Identify the plasmid
DNA fingerprinting technique was first developed by
Choose the correct statement with reference to “Dolly”
An example of gene therapy is
What is the first step in the Southern Blot technique
DNA repairing is done by
cDNA probes are copied from the messenger RNA molecules with the help of
Find the incorrect statement
Which of the following is false for BT transgenic plant
In recombination vector used is
A tumour inducing plasmid widely used in the production of transgenic plants is that of
Southern blotting is done for
Crown gall disease in plants is caused by
First biochemical to be produced commercially by microbial cloning and genetic engineering is
In transgenics, expression of transgene in target tissue is determined by
A man with blood group B marries a woman with blood group A and their first child is having blood group B. What is the genotype of child?
One of the following is not the types of blood groups or blood factors:
Blood group ‘O’ has:
If the foetus is Rh+ and mother is Rh– then:
Publish Year
August 2025
Last Update
August 16, 2025
Language
English
Level
expert
Total Questions
664
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