What offspring will be obtained by crossing a hornless (hornless) homozygous cow (A) with a horned bull?
| September 3, 2021 | education
According to the condition of the problem and the introduced designations, we will write the gene for hornlessness as A, then the gene that determines the development of horns will be a.
A homozygous hornless cow will be AA, her eggs will be A.
A bull, in order to have horns, must genotypically be a homozygote – aa. The sperm it produces – a.
All offspring from a given pair of individuals will be genotypically represented by heterozygous calves – Aa, which at the level of the phenotype corresponds to annoying.
Answer: all calves will be hornless (Aa).
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