A rooster with a particular comb morphology calledwalnut was crossed to a hen with a type of comb morphology known as single. The F1 progeny all had walnut combs. When F1 males and females were crossedto each other, 93 walnut and 11 single combs wereseen among the F2 progeny, but there were also29 birds with a new kind of comb called rose and32 birds with another new comb type called pea.a. Explain how comb morphology is inherited.b. What progeny would result from crossing a homozygous rose-combed hen with a homozygouspea-combed rooster? What phenotypes and ratioswould be seen in the F2 progeny?c. A particular walnut rooster was crossed to a peahen, and the progeny consisted of 12 walnut,11 pea, 3 rose, and 4 single chickens. What are thelikely genotypes of the parents?d. A different walnut rooster was crossed to a rosehen, and all the progeny were walnut. What are thepossible genotypes of the parents?
A rooster with a particular comb morphology called
walnut was crossed to a hen with a type of comb morphology known as single. The F1 progeny all had walnut combs. When F1 males and females were crossed
to each other, 93 walnut and 11 single combs were
seen among the F2 progeny, but there were also
29 birds with a new kind of comb called rose and
32 birds with another new comb type called pea.
a. Explain how comb morphology is inherited.
b. What progeny would result from crossing a homozygous rose-combed hen with a homozygous
pea-combed rooster? What
would be seen in the F2 progeny?
c. A particular walnut rooster was crossed to a pea
hen, and the progeny consisted of 12 walnut,
11 pea, 3 rose, and 4 single chickens. What are the
likely genotypes of the parents?
d. A different walnut rooster was crossed to a rose
hen, and all the progeny were walnut. What are the
possible genotypes of the parents?
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