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Chickens have different comb morphologies which can be walnut, pea, single or rose. Suppose that a...

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Biology

Chickens have different comb morphologies which can be walnut,pea, single or rose. Suppose that a walnut combed hen is crossedwith a single combed roster; the F1 progeny all have walnut combs.These are then crossed to each other and the F2 progeny are: 93walnut, 11 single, 29 rose, 32 pea.

A) How is comb morphology inherited?

B) What would the progeny be if you crossed a homozygous rosecombed hen with a homozygous pea combed roster? What are thephenotypic ratios that you would see in the F2 progeny?

C) If a walnut rooster is crossed to a pea hen and the progenyare 12 walnut, 11 pea, 3 rose and 4 single, what are the genotypesof the parents?

D) If a walnut rooster is crossed to a rose hen and all theprogeny are walnut, what are the genotypes of the parents?

Answer & Explanation Solved by verified expert
4.4 Ratings (946 Votes)
a there are two genes that control the comb morphology let the genes be R and P Rpp rose comb rrP pea comb RP walnut comb rrpp single comb B the genotype of thehomozygous rose combed hen is RRpp and the genotype of the    See Answer
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