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.