A yellow guinea pig, when crossed with a white one, always produces yellow offspring.

A yellow guinea pig, when crossed with a white one, always produces yellow offspring. What offspring should be expected from two heterozygous individuals.

Based on the condition of the problem, it can be concluded that there is a phenomenon of complete dominance in the inheritance of hair color in guinea pigs.

Let’s designate the gene responsible for the development of yellow wool as A, then the gene that determines the development of white wool will be a.

Heterozygous Aa guinea pigs will have yellow hair and produce A and a germ cells.

From crossing such guinea pigs, we get the following offspring:

Yellow guinea pigs (AA and Aa) – 75%;

guinea pigs with white wool (aa) – 25%.