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Class XII Biology Principles of Inheritance and Variation 3

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Question 1

A dihybrid for qualitative trait is crossed with homozygous recessive individual, the phenotypic ratio is

Question 2

Probability of genotype TTrr in F₂ generation of a dihybrid cross is

Question 3

Grain colour in wheat is determined by three pairs of polygenes. Following the cross AABBCC (dark colour) × aabbcc (light colour), in F₂ generation. What proportion of the progeny is likely to resemble either parent?

Question 4

Assertion (A): The linked genes tend to get inherited together.
Reason (R): The bond between them fails to break.

Question 5

Mendel selected Pisum sativum for hybridisation experiments because of

Question 6

Which blood group genotype is homozygous dominant?

Question 7

Test cross involves

Question 8

Incomplete dominance is shown by :

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Aug 25NEET & AIIMS