What is the phenotype of a mouse that has the genotype Bb where capital B is the gene for black fur and b is the gene for brown fur, assuming the gene follows a Mendelian inheritance pattern?

Answer 1

In the case of the genotype Bb, where capital B represents the gene for black fur and lowercase b represents the gene for brown fur, the phenotype of the mouse will be black fur. This is because black fur (B) is the dominant trait over brown fur (b) in Mendelian inheritance. Therefore, a mouse with the Bb genotype will express the dominant phenotype, which is black fur.