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

Question

Fur with black hairs.
Fur with yellow hairs.
Fur with brown hairs.
Fur with both black and brown hairs.

Answer 1

The phenotype of a mouse with the genotype Bb, where B is a gene for black fur and b is a gene for brown fur, would be fur with black hairs. This is because the allele for black fur (B) is dominant over the allele for brown fur (b), according to Mendelian inheritance patterns.