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Feathered (F-) shank in chickens is dominant to clean (ff) shanks and white feathers (I-) is...

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Biology

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.  

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

Answer & Explanation Solved by verified expert
4.2 Ratings (625 Votes)
Lets first write the genotypes of parentsparent1 rooster FIRpp F for feathered I for whiteRpp for pea combparent2 hen FIRP F for feathered I for white RPfor walnutthe genotype of one of the offsprings ffiirrpp ff for cleanii    See Answer
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