the dominant allele is for black fur. the recessive allele is for white fur. a mouse that is homozygous for…

Brief Explanations:

In genetics, a homozygous - dominant individual has two copies of the dominant allele, and a homozygous - recessive individual has two copies of the recessive allele. The dominant allele determines the phenotype when present. For fur color in mice, if the dominant allele (B) is for black fur and the recessive allele (b) is for white fur, a homozygous - dominant mouse has genotype BB and black fur, while a homozygous - recessive mouse has genotype bb and white fur.

Answer:

A mouse that is homozygous for the dominant trait has the genotype BB. It has black fur. A mouse that is homozygous for the recessive trait has the genotype bb. It has white fur.