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NEET Principles of Inheritance and Variation PYQs with Solutions

872 previous year questions from Principles of Inheritance and Variation (NEET UG Zoology) with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

872 questionsZoology2004–2026Answers + solutions

About Principles of Inheritance and Variation PYQs

Principles of Inheritance and Variation has 872 previous year questions in the Quantrex Academy NEET UG Zoology bank. The 220 questions in this list come from NEET (165) and JIPMER (55), spanning 2004 to 2026. Each question opens on its own page with the options, the correct answer and the worked solution where available.

NEET Principles of Inheritance and Variation PYQs with Solutions

About Principles of Inheritance and Variation PYQs

Questions by year (this list)

Principles of Inheritance and Variation questions with solutions

Match List I with List II : List I List II A. Incomplete dominance I. Human skin colour B. Co-dominance II. Inheritance of flower colour in Antirrhinum sp. C. Pleiotropy III.

The sixth mutant codon of beta globin gene causing polymerization of Haemoglobin and change in RBC shape is :

In a population of a grasshopper species, the chromosome number of some members is 23 and some other members possess 24 chromosomes. The 23 and 24 chromosome-bearing members in

Which one of the following disorders is caused by the substitution of Glutamic acid (Glu) by Valine (Val) at the sixth position of the beta globin chain of the haemoglobin

What is the probability of having children with 'O' blood group, where both mother and father are heterozygous for 'A' and 'B' blood group, respectively ?

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R . Assertion A : In an experiment, Mendel observed that the F1 progeny plants

Given below are two statements : Statement I : Down's syndrome is caused by the absence of one of the X-chromosomes. Statement II : Turner's syndrome is caused by the presence of

Which of the following statements are true with reference to the sex-determination in honeybees ? A. An offspring formed from the union of a sperm and an egg, develops as a female

For a person with blood group ‘O’, which of the following is not a possible combination of parents' blood group genotypes ?

With the help of given pedigree, find out the probability for the birth of a child having no disease and being a carrier (has the disease mutation in one allele of the gene) in

Genes R and Y follow independent assortment. If RRYY produce round yellow seeds and rryy produce wrinkled green seeds, what will be the phenotypic ratio of the F2 generation?

What is the pattern of inheritance for polygenic trait?

When a tall pea plant with round seeds was selfed, it produced the progeny of : (a) Tall plants with round seeds and (b) Tall plants with wrinkled seeds. Identify the genotype of

Match List-I with List-II: List-I List-II Type of Inheritance Example A.Incomplete dominance I. Blood groups in human B.Co-dominance II. Flower colour in Antirrhinum C.Pleiotropy

Given below are two statements: Statement I: Failure of segregation of chromatids during cell cycle resulting in the gain or loss of whole set of chromosome in an organism is

Given below are two statements: Statement I: When many alleles of a single gene govern a character, it is called polygenic inheritance. Statement II: In Polygenic inheritance, the

Aneuploidy is a chromosomal disorder where chromosome number is not the exact copy of its haploid set of chromosomes, due to : A. Substitution B. Addition C. Deletion D.

Which one of the following can be explained on the basis of Mendel's Law of Dominance? A. Out of one pair of factors one is dominant and the other is recessive. B. Alleles do not

Match List I with List II Choose the correct answer from the options given below:

A pink flowered Snapdragon plant was crossed with a red flowered Snapdragon plant. What type of phenotype/s is/are expected in the progeny?

In a plant, black seed color (BB/Bb) is dominant over white seed color (bb). In order to find out the genotype of the black seed plant, with which of the following genotype will

Match List I with List II : List I List II A. Down's syndrome I. 11^ th chromosome B. α-Thalassemia II. 'X' chromosome C. β-Thalassemia III. 21^ st chromosome D. Klinefelter's

In which disorder change of single base pair in the gene for beta globin chain results in change of glutamic acid to valine?

Match List-I with List-II. Choose the correct answer from the options given below :

A heterozygous pea plant with violet flowers was crossed with a homozygous pea plant with white flowers. Violet is dominant over white. Which one of the following represents the

A certain plant homozygous for yellow seeds and red flowers was crossed with a plant homozygous for green seeds and white flowers. The F_1 plants had yellow seeds and pink

Frequency of recombination between gene pairs on same chromosome as a measure of the distance between genes to map their position on chromosome, was used for the first time by

The phenomenon of pleiotropism refers to:

Which one of the following symbols represents mating between relatives in human pedigree analysis?

Select the correct statement/s with respect to mechanism of sex determination in Grasshopper. (A) It is an example of female heterogamety. (B) Male produces two different types of

Broad palm with single palm crease is visible in a person suffering from-

Select the correct statements about sickle cell anaemia. (A) There is a change in gene for beta globin. (B) In the beta globin, there is valine in the place of Lysine. (C) It is

Which of the following statements are correct about Klinefelter&#39;s Syndrome? A. This disorder was first described by Langdon Down (1866). B. Such an individual has overall

Given below are two statements : Statement I : Sickle cell anaemia and Haemophilia are autosomal dominant traits . Statement II : Sickle cell anaemia and Haemophilia are disorders

If a female individual is with small round head, furrowed tongue, partially open mouth and broad palm with characteristic palm crease. Also the physical, psychomotor and mental

The chromosomal theory of inheritance was proposed by :

What is the expected percentage of F_2 progeny with yellow and inflated pod in dihybrid cross experiment involving pea plants with green coloured, inflated pod and yellow coloured

Select the incorrect match regarding the symbols used in Pedigree analysis:

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

XO type of sex determination can be found in:

Given below are two statements one is labelled as: Assertion (A) and the other is labelled as Reason (R). Assertion (A): Mendel&#39;s law of independent assortments does not hold

Which of the following occurs due to the presence of autosome linked dominant trait?

The recombination frequency between the genes a and c is 5 % , b and c is 15 % , b and d is 9 % , a and b is 20 % , c and d is 24 % and a and d is 29 % . What will be the sequence

If a colour blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness?

A normal girl, whose mother is haemophilic marries a male with no ancestral history of haemophilia. What will be the possible phenotypes of the offsprings ? (a) Haemophilic son

The production of gametes by the parents, formation of zygotes, the F _ 1 and F _ 2 plants, can be understood from a diagram called:

In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny will be diseased?

The number of contrasting characters studied by Mendel for his experiments was:

How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?

Select the correct match.

Identify the wrong statement with reference to the gene &lsquo;I&rsquo; that controls ABO blood groups.

Chromosomal theory of inheritance was proposed by:

The best example for pleiotropy is:

Experimental verification of the chromosomal theory of inheritance was done by

Karyotype of Down's syndrome has how many chromosomes?

Gynaecomastia is present in which syndrome?

A normal man and a normal woman both having one of their parent albino, if get married then what is the probability of their child of being albino?

Which one of them is odd with respect to human male?

Match the items of Column I with Column II. Select the correct option from the following

In which genetic condition, each cell in the affected person, has three sex chromosomes XXY?

In a marriage between male with blood group A and female with blood group B, the progeny had either blood group AB or B . What could be the possible genotype of parents?

The production of gametes by the parents, the formation of zygotes, the F_1 and F_2 plants, can be understood using

The genetic disorder in which an individual has an overall masculine development, gynaecomastia and is sterile:

The frequency of recombination between gene pairs on the same chromosome as a measure of the distance gene was explained by:

Select the incorrect statement.

What map unit (Centimorgan) is adopted in the construction of genetic maps?

Which of the following muscular disorders is inherited?

In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F 1 generation, pink flowers were obtained. When pink flowers were selfed, the F 2 generation

AB blood group shows

Non-disjunction in meiosis results in

Which trait is shown by given pedigree analysis?

Which of the following pairs is wrongly matched?

Select the correct statement.

A woman has X-linked condition on one of her X chromosomes. These chromosomes can be inherited by:

Which of the following characteristics represent 'Inheritance of blood groups' in humans? i. Dominance ii. Co-dominance iii. Multiple alleles iv. Incomplete dominance v. Polygenic

If two persons with 'AB' blood group marry and have suffeciently large number of children, these children could be classified as 'A' blood group. 'AB blood group 'B' blood group

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

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 assortments does not hold

Identify the wrong statement with reference to the gene ‘I’ that controls ABO blood groups.

The term ''linkage'' was coined by:

An abnormal human baby with 'XXX' sex chromosomes was born due to:

A man with blood group 'A' marries a woman with blood group 'B'. What are all the possible blood groups of their offsprings?

A human female with Turner's syndrome