The first visible signs of senescence are usually observed in a person's ___

Answer:

Brachydactyly and Huntington's are phenotypic conditions that occur when a person possesses one or two dominant alleles for those traits.

John's father has Huntington's disease but does not have brachydactyly, which means his genotype is Hh/bb.

John's mother, who is healthy and has brachydactyly, likely has a genotype of hh/BB or hh/Bb.

The correct response is B

Assuming the black fur allele is B and the white fur allele is b, breeding a homozygous black rabbit with a heterozygous black rabbit will lead to the outcomes shown in the punnet square below;

Genotypically, 50% of the offspring will be homozygous dominant, while the other 50% will be heterozygous. However, all offspring will display black fur because the black allele is dominant over the grey allele.