Question

You are looking at the color of feathers in ducks and find that Green feathers (G) are dominant to yellow feathers (g). However, a second gene, H, controls whether the color will be expressed in the feathers. If the duck is hh, the duck will always be white, because the pigment does not go into feathers. What ratio of phenotypes in the progeny would you expect following a dihybrid cross

Answer 1

Option C , 9:3:4

Step-by-step explanation:

The options for the questions are there in the attachment

Solution-

This is the case of recessive epistasis in which recessive allele has a masking effect on alleles G and g.

GgHh * GgHh

The offspring will be

GH Gh gH gh

GH GGHH GGHh GgHH GgHh

Gh GGHh GGhh GgHh Gghh

gH GgHH GgHh ggHH ggHh

gh GgHh Gghh ggHh gghh

Green colored - 9

Yellow colored - 3

White colored- 4