Inheritance of Fur Color in Guinea Pigs

Why did all of the offspring have black fur?

A. Because black fur is dominant to white fur

B. Because the parent with white fur had a mutation

C. Because black fur is a trait that can skip a generation

D. Because the parent with white fur carried a gene for black fur

Answer:

The offspring had black fur because black fur is dominant to white fur in guinea pigs.

The reason all of the offspring had black fur is because black fur is dominant to white fur in guinea pigs.

Genes come in different forms called alleles. In this case, the allele for black fur is dominant, meaning it masks the expression of the allele for white fur.

Since the purebred guinea pig with black fur is homozygous dominant (BB) for the black fur allele, all of its offspring will inherit at least one copy of the dominant allele and have black fur.