PATHOLOGY

Detailed explanation-1: -The factor for brown fur is recessive (b). Use the Punnett square to predict what fraction of offspring will be black. Since the dominant factor for black fur is present in all the matches, all the mice would have black fur.

Detailed explanation-2: -The allele for black fur (FB) is co-dominant with white fur (FW) in mice and when both the alleles are present together, the mice will have black and white spotted fur. The allele for brown eyes (B) is dominant over blue eyes (b) in mice.

Detailed explanation-3: -In mice, black fur (B) is dominant to brown fur (b) and a short tail (T) is dominant to a long tail (t). Two mice with the genotype BbTt have two separate litters of offspring together.

Detailed explanation-4: -In mice, black fur is dominant to white, and long fur is dominant to short.