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Class XII Biology Principles of Inheritance and Variation 1

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Question 1

Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridized, the F₂ segregation will show

Question 2

An exception to Mendel's law is

Question 3

A self-fertilizing trihybrid plant forms

Question 4

Who used the word "chromosome"

Question 5

In wheat, when a green plant was self-fertilized, the progeny had 209 green seedlings and 14 white seedings. The above result indicates that

Question 6

After crossing two plants, the progenies are found to be male sterile. The phenomenon is found to be maternally inherited and is due to some genes which reside in

Question 7

Linkage disproves which of the following law of Mendel?

Question 8

Choose which of the following statements are correct with respect to epistasis
(1) one gene masks the expression of the other
(2) effective gene is called epistatic while affected gene is called hypostatic
(3) 9: 7 ratio is obtained in every case.
(4) effective gene is called hypostatic while affected gene is called epistatic

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Jul 12NEET & AIIMS