Feathered (F-) shank in chickens is dominant to clean (ff)shanks and white feathers (I-) is dominant to black (ii) feathers.Comb structure is controlled by 2 epistatic genes R and P withalternate alleles r and p. R-P- gives the phenotype walnut, R-pppea, rrP- rose and rrpp single.  All of these genes areindependently assorting. A white, feathered shank, walnut combchicken was mated with a white, feathered, pea comb rooster andproduced a black, clean, single comb chick. Â
Using this information, predict the proportion of additionalprogeny that would have the following phenotype: White, clean,walnut.
a.18/256
b.36/256
c.4/256
d.81/256
e.12/256
