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NEET Principles of Inheritance and Variation PYQs with Solutions

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

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About Principles of Inheritance and Variation PYQs

Principles of Inheritance and Variation has 58 previous year questions in the Quantrex Academy NEET UG Biology bank. The 58 questions in this list come from MHT CET Medical (58), spanning 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

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Principles of Inheritance and Variation questions with solutions

Point mutation is __________

Choose the group of correct statements regarding sex-linked inheritance. A) Y-linked genes are inherited only in males. B) X-linked genes are inherited only in females. C)

How many pair/s of contrasting characters in the pod of pea were considered by Mendel in his experiments?

Development of feminine characters and no spermatogenesis are characteristic feature of people with __________.

According to Mendel, a gamete generally contains __________.

The number of linkage groups of a particular species corresponds to its _________ number of chromosomes.

A man, homozygous dominant for widows peak (WW), marries a woman with straight hairline homozygous recessive (ww). How many of their off springs will inherit straight hair line?

Extra copy of 21st chromosome causes _________ in human.

Linkage of genes in plants was discovered by ________.

Match types of variation in column I with their causes in column II. Select the correct option. Column I Column II A. Gene mutation I. occurs due to crossing over B. Gene

Which one of the following does NOT show non-allelic interaction?

With respect to a specific genus and its species, a monohybrid cross is a cross between________.

Female gametes in a plant have genotypes TR, Tr, tR and tr with respect to height (T/t) and flower colour. (R/r). What will be the phenotype of this plant?

In a typical monohybrid, a cross with respect to a certain trait, 120 plants are obtained in the F_2 generation. What will be the approximate number of homozygous and heterozygous

The genes located on homologous regions of X and Y chromosomes do not inherit together because crossing over occurs in this region. Thus, they exhibit incomplete sex linkage. They

Match the disorders in List I with their causes in List II and choose the correct option. List I List II (A) Thalassemia. (I) non-disjunction of sex chromosomes. (B) Sickle-cell

With respect to Sex determination pattern in Birds which of the following statement is true?

Given below are two statements. Statement I - Only males can suffer from haemophilia. Statement II - The gene for normal clotting of blood in human is recessive. In the light of

Identify the chromosomal aberration from the given diagram

A cross between two plants resulted in the formation of tall and dwarf offsprings in the ratio of 3:1. The genotypes of their parents will be __________.

Which one of the following characters does NOT belong to Down's Syndrome?

Match the phenomenon in Column I with the Scientist who suggested it in Column II Column I (Phenomenon) Column II (Scientist) (A) Linkage (I) Sutton and Boveri (B) Chromosomes

Which type of sex determination is seen in honey bees?

Deficiency of clotting factor VIII or IX in the blood causes _________.

Hypertrichosis is _____________ character.

Match List I with List II List I Types of gene interaction. List II Examples. (A). Pleiotropy (I). Mirabilis jalapa (B). Codominance (II). ABO blood group (C). Incomplete

Which of the following statements are CORRECT? Statement (I): Thalassemia is an autosomal, inherited recessive disease. Statement (II): Haemoglobin molecule is made up of four

Study the following statements and select the correct option: Statement (I): Examples of Mendelian disorders are Turner's syndrome and Down's syndrome. Statement (II): Mendelian

A sickle-cell carrier man marries a woman who is carrier for sickle-cell anaemia. What are the chances of having carrier children?

In a population with two alleles B and b with frequency 0.6 and 0.4 in Hardy-Weinberg equillibrium. How many heterozygous individuals in a sample of 250 can be expected?

A pea plant with genotype RrYy is crossed with another pea plant with genotype rryy. What will be the number of phenotypes obtained by this cross?

Which one of the following is a symptom of Klinefelter's Syndrome?

A normal woman whose father was colourblind is married to a normal man, (assuming equal distribution of female gametes), then _________.

In the F_2 generation, the genotypic and phenotypic ratios are identical in ____.

In X and Y chromosomes, crossing over occurs only between ____.

How many of the following statements are correct about Mendelian alleles? (A). The dominant allele expresses itself in the presence of an alternative allele. (B). The recessive

Which one of the following could NOT be the genotypes of the parents of a child with the blood group "O" Rh^ +ve ?

Which one of the following crosses will have all the offsprings with recessive phenotype in the F_2 generation?

In sickle cell anemia, the carrier (heterozygous) individuals can be identified by the microscopic examination of ____ cells.

Which one of the following disorder shows symptoms of excess of phenylalanine in urine of humans?

Match List I with List II List I (Genetic disorders) List II (Type) (A). Thalassemia (I). X-monosomy (B). Turner's syndrome (II). Extra X-chromosome (C). Klinefelter's syndrome

Identify the INCORRECT statement about red-green color blindness in human.

Morgan carried out several dihybrid crosses in Drosophila . Which one of the following crosses helped him find the sex-linked inheritance?

Match List I with List II List I (Gene interaction) List II (Examples) (A). Holandric genes (I). Multiple effects of a single gene (B). Pleiotropy (II). Hypertrichosis (C).

In a cross between a pure tall pea plant with yellow pod and a pure short plant with green pod, how many double recessive plants would you expect in F_2 generation?

Study the following statements. (A). Due to incomplete linkage the parental traits are inherited in offsprings. (B). Due to incomplete linkage new traits occur in offsprings. (C).

Girl of normal vision whose father was colorblind marries a man of normal vision whose father was also colourblind. The sons of this marriage would be

How many of the following genotypes are representing tall plants with round seeds? TTrr, Ttrr, TtRr, TTRr, ttrr, TtRR

Which one of the following is a mismatch?

Match List I with List II List I (Organism) List II (Chromosome number) (A). Mus musculus (I). 01 (B). Homo sapiens (II). 10 (C). Arabidopsis thaliana (III). 40 (D). E. coli (IV).

Read the following statement with respect to Phenylketonuria (PKU) and select the correct option. (A). It is an inborn disorder caused due to dominant gene. (B). When recessive

In mutation breeding, which of the following does NOT represent chemical mutagens?

Linkage of genes in plants was discovered by -----------------.

Which one of the following is NOT an example of complete sex linkage ?

In a monohybrid cross between pure tall pea plant with pure dwarf pea plant, how many types of genotypes are found in the F_2 generation ?

Match List I with List II List I (Organisms) List II (Chromosome number) (A). Roundworm (I). 40 (B). Mouse (II). 32 (C). Fruit fly (III). 12 (D). Yeast (IV). 8 Choose the correct

Which one of the following is NOT a symptom of Turner's syndrome ?

The daughter of a colour- blind father and a normal mother marries a normal male. What percentage of male children of this couple will be colour -blind ?

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