A certain species of rabbit can have either black or grey fur. The allele for black fur is dominant over the allele for grey fur. If a homozygous black rabbit is crossed with a heterozygous black rabbit, what phenotypic ratio will occur in the first generation?

A.
25% black : 75% grey

B.
75% black : 25% grey

C.
100% black : 0% grey

D.
50% black : 50% grey