What percentage of the F2 offspring predicted in a cross for mice coat color

Question

In mice, the allele for black fur is dominant to the allele for brown fur. If a male homozygous black mouse is crossed with a female brown mouse, what percentage of the F2 offspring do you predict will be homozygous?

Answer 1

Since both parents have to be homozygous, all of F1 will be heterozygous (Bb).

Do a Punnett square for F2.

https://www.google.com/search?client=safari&rls=en&q=Punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl

Answer 2

50

Answer 3

25