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Genetics Questions

Practice 130 Genetics questions with detailed answers and explanations. Free MCQs, PYQs, and mock test questions for NEET, JEE, GATE, SSC and more.

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33
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85
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12
Hard
Practice by Exam:Biology(118)BIOLOGY(5)Botany(4)Zoology(2)General Science(1)

About Genetics — practice questions, PYQs & concepts

Genetics is a frequently-tested topic on Biology, BIOLOGY, Botany. ExamTest.live currently lists 130 Genetics questions spanning previous-year papers from 2026 to 2026, each with worked solutions and a step-by-step explanation. Use the filters on this page to focus on a specific exam, difficulty level or year — every answer key is free, no sign-up required.

Genetics weight in competitive exams

Across our Genetics question bank, the largest sources are Biology (118), BIOLOGY (5), Botany (4), Zoology (2) and General Science (1). Click any exam chip above to drill down to that exam-specific question set.

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  • Start easy: 33 easy Genetics questions are available — build fluency before moving up.
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All Genetics Questions(1–100 of 130)

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Q1mediummcqBiologyNEET 20192026
0% accuracy
The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by:
Q2hardmcqBiologyNEET 20192026
0% accuracy
In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F1 generation pink flowers were obtained. When pink flowers were selfed, the F2 generation showed white, red and pink flowers. Choose the incorrect statement from the following:
Q3mediummcqBiologyNEET 20192026
0% accuracy
A gene locus has two alleles . If the frequency of dominant allele is , then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?
Q4mediummcqGeneral ScienceSSC CGL2026
0% accuracy
Chromosomes found in the salivary glands of Drosophila are:
Q5mediummcqBiologyNEET 20192026
0% accuracy
What is the genetic disorder in which an individual has an overall masculine development, gynaecomastia, and is sterile?
Q6hardmcqBiologyNEET 20192026
0% accuracy
Select the incorrect statement.
Q7easymcqBiologyNEET (UG) 20172026
0% accuracy
Among the following characters, which one was not considered by Mendel in his experiments on pea?
Q8mediummcqBiologyNEET 20192026
0% accuracy
What map unit (Centimorgan) is adopted in the construction of genetic maps?
Q9easymcqBiologyNEET 20222026
Given below are two statements:Statement I: Mendel studied seven pairs of contrasting traits in pea plants and proposed the Laws of Inheritance.Statement II: Seven characters examined by Mendel in his experiment on pea plants were seed shape and colour, flower colour, pod shape and colour, flower position and stem height.In the light of the above statements, choose the correct answer from the options given below:
Q10easymcqBiologyNEET 20212026
The production of gametes by the parents, formation of zygotes, the and plants can be understood from a diagram called:
Q11hardmcqBiologyNEET 20172026
A disease caused by an autosomal primary non-disjunction is:
Q12mediummcqBiologyNEET 20212026
In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny will be diseased?
Q13easymcqBIOLOGYNEET 20192026
The production of gametes by the parents, the formation of zygotes, and the and plants can be understood using:
Q14mediummcqZoologyNEET 2024 R1@NUM: 1642026
Match List I with List II:
image
Q15easymcqBiologyNEET 20232026
Frequency of recombination between gene pairs on some chromosome as a measure of the distance between genes to map their position on chromosome, was used for the first time by:
Q16mediummcqBiologyNEET (UG) 20182026
Select the correct match:
Q17hardmcqZoologyNEET 2024 R1@NUM: 1942026
Father is B+, Mother is A+, and Child is O+. What are the genotypes of the parents?
Q18mediummcqBiologyGeneral Knowledge Studies2026
The human sex chromosomes determine the gender of the child, with being:
Q19easymcqBiologyNEET 20172026
Which one from those given below is the period for Mendel's hybridization experiments?
Q20mediummcqBotanyNEET 2024 R1@NUM: 1222026
In a plant, black seed color () is dominant over white seed color (). In order to find out the genotype of the black seed plant, with which of the following genotype will you cross it?
Q21mediummcqBotanyNEET 2024 R1@NUM: 1172026
Which one of the following CANNOT be explained on the basis of Mendel’s Law of Dominance?
Q22mediummcqBiologyNEET 20222026
If a colour blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness?
Q23hardmcqBiologyNEET 20172026
Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement:
Q24easymcqBiologyNEET 20232026
Given below are two statements:Statement I: RNA mutates at a faster rate.Statement II: Viruses having RNA genome and shorter life span mutate and evolve faster.In the light of the above statements, choose the correct answer:
Q25easymcqBiologyNEET 20232026
Broad palm with single palm crease is visible in a person suffering from:
Q26easymcqBiologyNEET 20232026
The phenomenon of pleiotropism refers to:
Q27hardmcqBiologyNEET 20222026
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).Assertion (A): Mendel’s law of Independent assortment does not hold good for the genes that are located closely on the same chromosome.Reason (R): Closely located genes assort independently.Choose the correct answer from the options given below:
Q28easymcqBiologyNEET 20232026
Which of the following symbols represents mating between relatives in human pedigree analysis?
image
Q29easymcqBiologyNEET 20222026
XO type of sex determination can be found in:
Q30mediummcqBiologyNEET 20222026
Which of the following occurs due to the presence of an autosome linked dominant trait?
Q31mediummcqBotanyNEET 2024 R1@NUM: 1212026
A pink flowered Snapdragon plant was crossed with a red flowered Snapdragon plant. What type of phenotype/s is/are expected in the progeny?
Q32mediummcqBiologyNEET 2020 E12026
Select the correct match.
Q33easymcqBiologyNEET 20232026
Which of the following statements are correct about Klinefelter’s Syndrome?A. This disorder was first described by Langdon Down (1866).B. Such an individual has overall masculine development. However, the feminine development is also expressed.C. The affected individual is short statured.D. Physical, psychomotor and mental development is retarded.E. Such individuals are sterile.Choose the correct answer from the options given below:
Q34mediummcqBiologyNEET 2020 E12026
Identify the wrong statement with reference to the gene ‘I’ that controls ABO blood groups.
Q35easymcqBiologyNEET 20172026
Among the following characters, which one was not considered by Mendel in his experiments on pea?
Q36easymcqBIOLOGYNEET 20192026
In which genetic condition, each cell in the affected person has three sex chromosomes ?
Q37mediummcqBIOLOGYNEET 20192026
In a marriage between a male with blood group A and a female with blood group B, the progeny had either blood group AB or B. What could be the possible genotype of the parents?
Q38mediummcqBiologyNEET (UG) 20182026
Which of the following pairs is wrongly matched?
Q39mediummcqBiologyNEET 20172026
The genotypes of a Husband and Wife are I
A
I
B
and I
A
i. Among the blood types of their children, how many different genotypes and phenotypes are possible?
Q40mediummcqBIOLOGYNEET 20192026
Match the items of Column-I with Column-II:Column-I: (a) XX-XO method, (b) XX-XY method, (c) Karyotype-45, (d) ZW-ZZ methodColumn-II: (i) Turner's syndrome, (ii) Female heterogametic, (iii) Grasshopper, (iv) Female homogametic (human)
Q41mediummatch/followingBotanyNEET 2024 R1@NUM: 1032026
Match List I with List II:
Q42hardmcqBiologyNEET 20222026
The recombination frequency between the genes a & c is , b & c is , b & d is , a & b is , c & d is and a & d is . What will be the sequence of these genes on a linear chromosome?
Q43easymcqBIOLOGYNEET 20192026
From the following, identify the correct combination of salient features of the Genetic Code:
Q44mediummcqBiologyBiology
0% accuracy
A man and a woman, who do not show any apparent signs of a certain inherited disease, have seven children (2 daughters and 5 sons). Three of the sons suffer from the given disease but none of the daughters are affected. Which of the following mode of inheritance do you suggest for this disease?
Q45mediummcqBiologyBiology
0% accuracy
Genes for cytoplasmic male sterility in plants are generally located in:
Q46mediummcqBiologyBiology
0% accuracy
Which one of the following is not true for a species?
Q47mediummcqBiologyBiology
0% accuracy
At a particular locus, frequency of 'A' allele is 0.6 and that of 'a' is 0.4. What would be the frequency of heterozygotes in a random mating population at equilibrium?
Q48mediummcqBiologyBiology
0% accuracy
There are two opposing views about the origin of Modern man. According to one view, Homo erectus in Asia were the ancestors of modern man. A study of variations of DNA, however, suggested African origin of Modern man. What kind of observation on DNA variation could suggest this?
Q49mediummcqBiologyBiology
0% accuracy
Mutations can be induced with:
Q50mediummcqBiologyBiology
0% accuracy
What would be the number of chromosomes of the aleurone cells of a plant with chromosomes in its root tip cells?
Q51mediummcqBiologyBiology
0% accuracy
Which one of the following conditions correctly describes the manner of determining the sex in the given example?
Q52mediummcqBiologyBiology
33% accuracy
Which of the following is correct about molecular taxonomy?
Q53mediummcqBiologyBiology
0% accuracy
Which of the following is incorrect about molecular taxonomy?
Q54mediummcqBiologyBiology
0% accuracy
Which of the following statements about molecular taxonomy is correct?
Q55mediummcqBiologyBiology
A pleiotropic gene:
Q56easymcqBiologyBiology
In his classic experiments on pea plants, Mendel did not use:
Q57mediummcqBiologyBiology
A gene showing codominance has:
Q58easymcqBiologyBiology
The term ‘’linkage’’ was coined by:
Q59mediummcqBiologyBiology
Which one of the following is not applicable to RNA?
Q60mediummcqBiologyBiology
What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids ?
Q61mediummcqBiologyBiology
Telomere repetitive DNA sequences control the function of eukaryotic chromosomes because they:
Q62mediummcqBiologyBiology
How does molecular taxonomy help in classification?
Q63mediummcqBiologyBiology
Balbiani rings are sites of:
Q64mediummcqBiologyBiology
Identify the correct order of organisation of genetic material from largest to smallest:
Q65mediummcqBiologyBiology
Which of the following provides the most reliable classification of organisms?
Q66hardmcqBiologyBiology
In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree.
image
Q67mediummcqBiologyBiology
Which one of the following statements is true for protein synthesis (translation)?
Q68mediummcqBiologyBiology
Satellite DNA is important because it:
Q69mediummcqBiologyBiology
Haploids are more suitable for mutation studies than diploids because:
Q70mediummcqBiologyBiology
In a testcross involving dihybrid flies, more parental – type offspring were produced than the recombinant – type offspring. This indicates:
Q71mediummcqBiologyBiology
Match the terms in column I with their description in Column II:
Column I: (a) Dominance, (b) Codominance, (c) Pleiotropy, (d) Polygenic inheritance
Column II: (i) Many genes govern a single character, (ii) In a heterozygous organism only one allele expresses itself, (iii) In a heterozygous organism both alleles express themselves fully, (iv) A single gene influences many characters
Q72mediummcqBiologyBiology
A human male produces sperms with the genotypes AB, Ab, aB and ab pertaining to two diallelic characters in equal proportions. What is the corresponding genotype of this person?
Q73easymcqBiologyBiology
Which condition is correctly matched with its chromosomal abnormality?
Q74easymcqBiologyBiology
Which of the following most appropriately describes haemophilia?
Q75easymcqBiologyBiology
Which one of the following is the starter codon?
Q76mediummcqBiologyBiology
Study the pedigree chart given below:What does it show?
image
Q77easymcqBiologyBiology
A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the plants were selfed the resulting genotypes were in the ratio of:
Q78easymcqBiologyBiology
Which of the following is required as inducer(s) for the expression of Lac operon?
Q79mediummcqBiologyBiology
Given below is a pedigree chart showing the inheritance of a certain sex-linked trait in humans.
image
The trait traced in the above pedigree chart is:
Q80mediummcqBiologyBiology
In the hexaploid wheat, the haploid () and basic () numbers of chromosomes are:
Q81easymcqBiologyBiology
The most popularly known blood grouping is the grouping. It is named and not , because "O" refers to having:
Q82easymcqBiologyBiology
A complex of ribosomes attached to single strand of RNA is known as:
Q83mediummcqBiologyBiology
Pick out the correct statements:(i) Haemophilia is a sex – linked recessive disease(ii) Down’s syndrome is due to aneuploidy(iii) Phenylketonuria is an autosomal recessive gene disorder(iv) Sickle cell anaemia is an autosomal recessive gene disorder
Q84easymcqBiologyBiology
Point mutation involves:
Q85easymcqBiologyBiology
Which one of the following generates new genetic combinations leading to variation?
Q86mediummcqBiologyBiology
Match Column-I with Column-II:Column-I: (a) Pistils fused together, (b) Formation of gametes, (c) Hyphae of higher Ascomycetes, (d) Unisexual female flowerColumn-II: (i) Gametogenesis, (ii) Pistillate, (iii) Syncarpous, (iv) Dikaryotic
Q87mediummcqBiologyBiology
Molecular basis of organ differentiation depends on the modulation in transcription by:
Q88easymcqBiologyBiology
Which one of the following symbols and its representation used in human pedigree analysis is correct?
Q89mediummcqBiologyBiology
The mechanism that causes a gene to move from one linkage group to another is called:
Q90easymcqBiologyBiology
A true breeding plant is:
Q91mediummcqBiologyBiology
The unequivocal proof of as the genetic material came from the studies on a:
Q92mediummcqBiologyBiology
If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is:
Q93mediummcqBiologyBiology
Genetic drift operates in:
Q94mediummcqBiologyBiology
The "cri-du-chat" syndrome is caused by change in chromosome structure involving:
Q95mediummcqBiologyBiology
In maize, hybrid vigour is exploited by:
Q96mediummcqBiologyBiology
Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child?
Q97mediummcqBiologyBiology
In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by:
Q98mediummcqBiologyBiology
Test cross in plants or in involves crossing:
Q99mediummcqBiologyBiology
Genes for cytoplasmic male sterility in plants are generally located in :
Q100mediummcqBiologyBiology
During transcription, RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle-like structure. What is its DNA-binding sequence?
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