Question

In cross A, Morgan crossed Yellow bodied, white eyed female Drosophila with Brown bodied, red
eyed male Drosophila. What is the percentage of F2 organisms which show non parental
characters?
(A) 98.7%
(B) 1.3%
(C) 62.8%
(D) 37.2%​

Answer 1

I think the answer should be 98.7%

Answer 2

Answer:

(B) 1.3%

Explanation:

As the 2 genes [ for body colour and eye colour] were present on the same chromosome, the expression of his parental traits were higher than the non-parental traits. This happens due to a phenomena called linkage.

In this case, both the genes were very tightly linked, so they showed very less recombination.

Reference : NCERT Biology Class 12; Chapter-5; Page numbers 83 and 84