PATHOLOGY

Detailed explanation-1: -It is a heterozygous dominant Bb and has black fur.

Detailed explanation-2: -As black fur(B) is dominant over brown fur(b), therefore the cross obtained is as follows: BBXbb On crossing the two the progeny obtained are Bb which are all Black furred.

Detailed explanation-3: -In mice, black fur is dominant to white, and long fur is dominant to short.

Detailed explanation-4: -In guinea pigs, black fur color (B) is dominant to white (b). A white male guinea pig, whose parents were both black was bred with a female with black fur whose father had black fur and mother has white.

Detailed explanation-5: -In dogs, colored fur (E) is dominant to un-colored fur (e). Black fur color (B) is dominant to brown fur color (b). The E gene is epistatic to the B gene. A brown male dog is mated to a black female.