In the dihybrid cross AaBb ´ aabb , what proportion of individuals are expected to be homozygotic for both genes in the F 1 generation

In the dihybrid cross AaBb ´ aabb , what proportion of individuals are expected to be homozygotic for both genes in the F 1 generation? Assume that in guinea pigs, dark brown fur ( B ) is dominant to black fur ( b ). If you mate a homozygous black guinea pig with a heterozygous brown guinea pig, what proportion of the progeny will be black? Assume that in guinea pigs, dark brown fur ( B ) is dominant to black fur ( b ). If you mate a black guinea pig with a homozygous brown guinea pig, what proportion of the progeny will be homozygous?

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