In the guinea pig, the short is dominant, and the long is reactive, volume is dominant, and the white is reactive.

In the guinea pig, the short is dominant, and the long is reactive, volume is dominant, and the white is reactive. The male is dark-colored with long hair, homozygous in color, crossed with a female of white color and short hair, heterozygous in length. Find: F1

Let’s designate the gene that causes the development of short hair in guinea pigs as B, then the gene for long hair will be b.

Let’s designate the gene that causes the dark color of the coat in guinea pigs as C, then the gene for the white color will be c.

A dark-colored male guinea pig with long hair, according to the condition of the problem, is heterozygous in color. Let’s write it like this – bbСс. It will produce bC and bc sperm.

The white guinea pig – a female with short hair is heterozygous for hair length according to the condition of the problem – Bbcc. It produces eggs Bc and bc.

Possible offspring from crossing the presented guinea pigs will look like this:

dark guinea pigs with short hair (BbCc) – 25%;

short-haired white guinea pigs (Bbcc) – 25%;

dark guinea pigs with long hair (bbСс) – 25%;

short-haired guinea pigs with white hair (bbcc) – 25%.