Biology

In the given scenario, G represents the allele for grey fur, and g represents the allele for brown fur. According to the information provided, grey fur (G) is dominant over brown fur (g).

A heterozygous genotype means that an individual has two different alleles for a particular trait. In this case, a heterozygous mouse would have one copy of the grey fur allele (G) and one copy of the brown fur allele (g).

Option A, GG, represents a genotype with two copies of the grey fur allele, which would correspond to a mouse with grey fur.

Option B, Gg, represents a heterozygous genotype ...