Question

A mouse that is homozygous for the dominant trait has the genotype . It has . A mouse that is homozygous for the recessive trait has the genotype . It has . Image of fur color of mice

Answer 1

a homozygous dominant mouse has the genotype AA and it has the dominant color fur(might be black).

A homozygous recessive mouse has the genotype aa and it has the recessive color fur(might be white in your question).

Answer 2

Answer:

A mouse, his homozygous dominant trait is AA which might be shows black color of fur and with homozygous recessive trait aa which might be shows brown color of fur.

Explanation:

A mouse, his homozygous dominant trait is AA which might be shows black color of fur and with homozygous recessive trait aa which might be shows brown color of fur.

If we cross, both the genotypes  dominant trait is AA  and recessive trait aa together, then the offspring will produce with all Aa genotypes which shows black color of fur of the mouse. Brown color is suppressed under the effect of dominant trait AA, but it may be appear in the F2 generation.