Question

For the cross of round green and wrinkled yellow seeds, which of the following is incorrect with regards to the F2 generation?

(a) Round seeds were three times more abundant than yellow seeds

(b) Green seeds were three times less abundant than wrinkled seeds

(c) Round seeds were as abundant as the green seeds

(d) Yellow seeds were three times more abundant than green seeds

I had been asked this question in my homework.

The above asked question is from Inheritance of Two Genes-1 in portion Principles of Inheritance and Variation of Biology – Class 12

Answer 1

The correct choice is (d) Yellow seeds were three times more abundant than green seeds

For explanation: The roundness and greenness of the seeds are encoded by different genes. According to the law of independent assortment, these two should segregate independently of each other. Thus in the F2 generation, green seeds: yellow seeds = 3:1, round seeds: wrinkled seeds = 3:1. From this, we can have, green seeds: wrinkled seeds = 3:1, green seeds: round seeds = 1:1, yellow seeds: round seeds = 1:3, yellow seeds: wrinkled seeds = 1:1.