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Genetics Questions

Practice 150 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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150
Total Questions
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34
Easy
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104
Medium
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12
Hard
Practice by Exam:Biology(130)General Science(5)BIOLOGY(5)Botany(4)Zoology(2)Mathematics and Science(1)Science(1)Science & Technology(1)

About Genetics — practice questions, PYQs & concepts

Genetics is a frequently-tested topic on Biology, General Science, BIOLOGY. ExamTest.live currently lists 150 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 (130), General Science (5), BIOLOGY (5), Botany (4) and Zoology (2). Click any exam chip above to drill down to that exam-specific question set.

How to use this page

  • Start easy: 34 easy Genetics questions are available — build fluency before moving up.
  • Target weak years: Use the year filter to focus on the most recent 2026 paper or older PYQs you have not attempted.
  • Time yourself: Every question shows the average solve time so you can benchmark your speed against other students.
  • Read every explanation: Even on questions you got right — the explanation often surfaces a faster approach you can reuse.

All Genetics Questions(1–100 of 150)

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Q1mediummcqBiologyGovernment Competitive Exam2026
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Which among the following do NOT have a perfect pair of sex chromosomes
Q2mediummcqBiologyNEET 20192026
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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?
Q3hardmcqBiologyNEET 20192026
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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:
Q4mediummcqScienceWest Bengal Civil Services2026
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One turn of DNA helix measures
Q5mediummcqBiologyIndian Competitive Exam Prep2026
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Which of the following apes is/are genetically closest to modern humans (Homo sapiens) sharing approximately of their DNA sequence alignment?
Q6mediummcqGeneral ScienceSSC CGL2026
100% accuracy
Which of the following constitute to form a gene?
Q7mediummcqBiologyCompetitive Exam Practice Paper2026
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The Pyrimidine bases in DNA are:
Q8mediummcqBiologyCompetitive Exam Practice Paper2026
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During cell division, DNA synthesis takes place in:
Q9mediummcqBiologyNEET 20192026
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What map unit (Centimorgan) is adopted in the construction of genetic maps?
Q10mediummcqGeneral ScienceSSC CGL2026
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Chromosomes found in the salivary glands of Drosophila are:
Q11mediummcqBiologyNEET 20192026
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The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by:
Q12mediummcqBiologyNEET 20192026
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What is the genetic disorder in which an individual has an overall masculine development, gynaecomastia, and is sterile?
Q13hardmcqBiologyNEET 20192026
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Select the incorrect statement.
Q14mediummcqGeneral ScienceCompetitive Exam2026
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Phenotypic ratio of Mendelian Dihybrid cross is __________
Q15mediummcqBiologyCompetitive Exam Practice Paper2026
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A pure red flower bearing plant is crossed with a pure white flower and the plant bears pink flowers. This is an example of
Q16easymcqBiologyNEET (UG) 20172026
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Among the following characters, which one was not considered by Mendel in his experiments on pea?
Q17mediummcqGeneral ScienceSSC CGL2026
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RNA is a polymeric molecule. What does RNA stand for?
Q18mediummcqBiologyNEET (UG) 20182026
Select the correct match:
Q19easymcqBiologyNEET 20172026
Which one from those given below is the period for Mendel's hybridization experiments?
Q20mediummcqBiologyCompetitive Exam Practice Paper2026
Crossing over occurs during meiosis at which stage?
Q21mediummcqBiologyCompetitive Exam Mock2026
The first transgenic crop was
Q22easymcqBiologyNEET 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:
Q23mediummcqGeneral ScienceCompetitive Exams2026
The double-helix structure of DNA was discovered by whom?
Q24mediummcqZoologyNEET 2024 R1@NUM: 1642026
Match List I with List II:
image
Q25mediummatch/followingBotanyNEET 2024 R1@NUM: 1032026
Match List I with List II:
Q26easymcqBiologyNEET 20232026
The phenomenon of pleiotropism refers to:
Q27easymcqBiologyNEET 20232026
Which of the following symbols represents mating between relatives in human pedigree analysis?
image
Q28hardmcqBiologyNEET 20172026
Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement:
Q29easymcqBiologyNEET 20172026
Among the following characters, which one was not considered by Mendel in his experiments on pea?
Q30mediummcqScience & TechnologyCompetitive Exam2026
The CRISPR-Cas9 technology is used for:
Q31mediummcqBiologyNEET (UG) 20182026
Which of the following pairs is wrongly matched?
Q32mediummcqBiologyCompetitive Exam Practice Paper2026
The "Particulate Theory of Inheritance" was proposed by:
Q33mediummcqBiologyIndian Competitive Exam Prep2026
What is the chromosome number in a human ovum?
Q34easymcqBiologyNEET 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:
Q35mediummcqBiologyGeneral Knowledge Studies2026
The human sex chromosomes determine the gender of the child, with being:
Q36mediummcqBotanyNEET 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?
Q37mediummcqBotanyNEET 2024 R1@NUM: 1172026
Which one of the following CANNOT be explained on the basis of Mendel’s Law of Dominance?
Q38hardmcqBiologyNEET 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?
Q39mediummcqBiologyNEET 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?
Q40mediummcqBiologyNEET 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?
Q41mediummcqBiologyWBCS Prelims2026
A pure red flower-bearing plant is crossed with a pure white flower-bearing plant, and the resulting generation plant bears pink flowers. In traditional competitive examinations following standard keys, this phenomenon is categorized under:
Q42hardmcqBiologyNEET 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:
Q43easymcqBiologyNEET 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:
Q44hardmcqZoologyNEET 2024 R1@NUM: 1942026
Father is B+, Mother is A+, and Child is O+. What are the genotypes of the parents?
Q45mediummcqBiologyNEET 20222026
Which of the following occurs due to the presence of an autosome linked dominant trait?
Q46mediummcqBotanyNEET 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?
Q47easymcqBiologyNEET 20212026
The production of gametes by the parents, formation of zygotes, the and plants can be understood from a diagram called:
Q48easymcqBiologyNEET 20232026
Broad palm with single palm crease is visible in a person suffering from:
Q49easymcqBiologyNEET 20222026
XO type of sex determination can be found in:
Q50easymcqBiologyCompetitive Exam2026
Which of the following represents the pair of sex chromosomes in women?
Q51mediummcqBiologyNEET 20212026
In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny will be diseased?
Q52mediummcqBIOLOGYNEET 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)
Q53easymcqBiologyNEET 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:
Q54easymcqBIOLOGYNEET 20192026
In which genetic condition, each cell in the affected person has three sex chromosomes ?
Q55easymcqBIOLOGYNEET 20192026
From the following, identify the correct combination of salient features of the Genetic Code:
Q56mediummcqCurrent AffairsSSC CGL2026
Which country has launched world's largest human genome research project to document genetic makeup of one lakh people?
Q57mediummcqBiologyNEET 2020 E12026
Select the correct match.
Q58mediummcqBIOLOGYNEET 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?
Q59easymcqBIOLOGYNEET 20192026
The production of gametes by the parents, the formation of zygotes, and the and plants can be understood using:
Q60hardmcqBiologyNEET 20172026
A disease caused by an autosomal primary non-disjunction is:
Q61mediummcqBiologyCompetitive Exam Practice Paper2026
A Barr body is absent in the somatic cells of an individual with:
Q62mediummcqMathematics and ScienceUPTET Paper 2 (Maths & Science)2026
Down’s syndrome is caused due to
Q63mediummcqBiologyNEET 2020 E12026
Identify the wrong statement with reference to the gene ‘I’ that controls ABO blood groups.
Q64mediummcqBiologyBiology
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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?
Q65mediummcqBiologyBiology
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Genes for cytoplasmic male sterility in plants are generally located in:
Q66mediummcqBiologyBiology
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Which one of the following is not true for a species?
Q67mediummcqBiologyBiology
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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?
Q68mediummcqBiologyBiology
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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?
Q69mediummcqBiologyBiology
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Mutations can be induced with:
Q70mediummcqBiologyBiology
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What would be the number of chromosomes of the aleurone cells of a plant with chromosomes in its root tip cells?
Q71mediummcqBiologyBiology
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Which one of the following conditions correctly describes the manner of determining the sex in the given example?
Q72mediummcqBiologyBiology
33% accuracy
Which of the following is correct about molecular taxonomy?
Q73mediummcqBiologyBiology
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Which of the following is incorrect about molecular taxonomy?
Q74mediummcqBiologyBiology
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Which of the following statements about molecular taxonomy is correct?
Q75mediummcqBiologyBiology
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Telomere repetitive DNA sequences control the function of eukaryotic chromosomes because they:
Q76mediummcqBiologyBiology
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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?
Q77mediummcqBiologyBiology
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In the hexaploid wheat, the haploid () and basic () numbers of chromosomes are:
Q78mediummcqBiologyBiology
100% accuracy
Molecular basis of organ differentiation depends on the modulation in transcription by:
Q79mediummcqBiologyBiology
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In maize, hybrid vigour is exploited by:
Q80mediummcqBiologyBiology
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During transcription, RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle-like structure. What is its DNA-binding sequence?
Q81mediummcqBiologyBiology
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The Okazaki fragments in DNA chain growth:
Q82mediummcqBiologyBiology
100% accuracy
The two polynucleotide chains in DNA are:
Q83mediummcqBiologyBiology
100% accuracy
Inheritance of skin colour in humans is an example of:
Q84mediummcqBiologyBiology
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One gene-one enzyme relationship was established for the first time in:
Q85mediummcqBiologyBiology
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Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridized, then segregation will show:
Q86mediummcqBiologyBiology
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Select the correct statement from the following:
Q87mediummcqBiologyBiology
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A common test to find the genotype of a hybrid is by:
Q88mediummcqBiologyBiology
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In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green seeded plants would you expect in generation?
Q89easymcqBiologyBiology
The term ‘’linkage’’ was coined by:
Q90mediummcqBiologyBiology
A pleiotropic gene:
Q91mediummcqBiologyBiology
What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids ?
Q92easymcqBiologyBiology
In his classic experiments on pea plants, Mendel did not use:
Q93mediummcqBiologyBiology
A gene showing codominance has:
Q94mediummcqBiologyBiology
Identify the correct order of organisation of genetic material from largest to smallest:
Q95mediummcqBiologyBiology
Which of the following provides the most reliable classification of organisms?
Q96mediummcqBiologyBiology
Which one of the following is not applicable to RNA?
Q97mediummcqBiologyBiology
Which one of the following statements is true for protein synthesis (translation)?
Q98hardmcqBiologyBiology
In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree.
image
Q99mediummcqBiologyBiology
How does molecular taxonomy help in classification?
Q100mediummcqBiologyBiology
Balbiani rings are sites of:
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How many Genetics questions are on ExamTest.live?▼
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Which exams include Genetics questions?▼
Genetics questions are commonly asked in Biology, General Science, BIOLOGY, Botany, Zoology. You can filter by exam using the links above.
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Start with easy questions to build confidence, then tackle medium and hard ones. Use the filter buttons to sort by difficulty. Reveal the answer only after attempting each question, and read the explanation thoroughly.