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

Option C , 9:3:4

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

GHGhgHgh

GHGGHHGGHhGgHHGgHh

GhGGHhGGhh GgHhGghh

gHGgHHGgHhggHHggHh

ghGgHhGghh ggHhgghh

Green colored - 9

Yellow colored - 3

White colored- 4

dna damages cause changes in the structure of the genetic material and prevents the replication mechanism from functioning and performing properly. dna damage and mutation have different biological consequences. while most dna damages can undergo dna repair, such repair is not 100% efficient.

air, water, heat and noise pollution can all be caused by producing and using technology. consuming resources - non-renewable resources, including precious metals like gold, are used to make technology