aesmithswhs
26.12.2019 •
Social Studies
In chickens, rose comb (r) is dominant to single comb (r). a homozygous rose-combed rooster is mated with a single-combed hen. all of the chicks in the f1 generation were kept together as a group for several years. they were allowed to mate only within their own group. what is the expected phenotype of the f2 chicks?
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Ответ:
25% Homozygous Rose Comb, 25% Homozygous Single Comb and 50% Heterozygous Rose Comb.
Explanation:
For a homozygous rose combed rooster (RR) and a homozygous single combed hen (rr), their first offspring F1 will be 100% heterozygous rose combed which has the genotype of Rr.
If the F1 generation are allowed to mate only among themselves, the second generation offspring, F2, will have 3 different genotypes which are homozygous rose comb (RR), homozygous single comb (rr) and heterozygous rose comb (Rr).
I hope this answer helps.
Ответ:
C. is the statement that was false