In dogs spotted fur (S) is a dominant trait. The recessive allele (s) results in brown fur. One dog is heterozygous for spotted fur and mates with a dog homozygous recessive, and they have puppies.


Which best describes the puppies?


Female Dog

S s

Male Dog s

s



A.

50% will be heterozygous, 0% will be homozygous dominant, and 50% will be homozygous recessive.


B.

50% will be heterozygous, 25% will be homozygous dominant, and 25% will be homozygous recessive.


C.

50% will be heterozygous, 50% will be homozygous dominant, and 0% will be homozygous recessive.


D.

25% will be heterozygous, 25% will be homozygous dominant, and 50% will be homozygous recessive.