Principles of Inheritance & Variation: NEET Biology Previous Year Questions

129 previous year questions from Principles of Inheritance & Variation. Here are the 25 most important ones; open any question for the correct answer and a full step-by-step solution.

1. 1.A certain road accident patient with unknown blood group needs immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of th…
2. 2.In his classic experiments on pea plants, Mendel did not use :
3. 3.Assuming that fur colour of an animal is dark, range of colour shade and white. A cross is made between a male (AABBCC) with dark fur colour and a female (aabbcc) with wh…
4. 4.The amino acid Tryptophan is the precursor for the synthesis of:
5. 5.Which Mendelian idea is depicted by a cross in which the $F_1$ generation resembles both the parents?
6. 6.In a population of 1000 individuals 360 belong to genotype AA, 480 to Aa and the remaining 160 to aa. Based on this data, the frequency of allele A in the population is :…
7. 7.Which of the following most appropriately describes haemophilia?
8. 8.ABO blood groups in humans are controlled by the gene I. It has three alleles - $l^A$, $I^B$ and i. Since there are here different alleles, six different genotypes ar…
9. 9.Fruit colour in squash is an example of :-
10. 10.Whether a tall plant from $F_1$ or $F_2$ has TT or Tt composition, it can be predicted by
11. 11.When two unrelated individuals or lines are crossed, the performance of $F_1$ hybrid is often superior to both its parents. This phenomenon is called :-
12. 12.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 ti…
13. 13.What map unit (Centimorgan) is adopted in the construction of genetic maps?
14. 14.In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by :-
15. 15.If both parents are carriers for thalassemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?
16. 16.The chromosomal theory of inheritance was proposed by :
17. 17.A man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind…
18. 18.Variation in gene frequencies within populations can occur by change rather than by natural selection. This is referred to as
19. 19.A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the F1 plants were selfed the resulting genotypes were in the ratio of:
20. 20.A cross in which an organism showing a dominant phenotype is crossed with the recessive parent in order to know its genotype is called
21. 21.Which Mendelism idea is depicted by a cross in which the $F_1$ generation resembles both the parents?
22. 22.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…
23. 23.The mechanism that causes a gene o move from the linkage group to another is called.
24. 24.The genotypes of a husband and Wife are $I^A{I}^B$ & $I^A$ i. Among the blood types of their children, how many different genotypes and phenotypes are possible?
25. 25.Select the correct match Column-I Column-II