In cats, the genes for yellow and black color are located on the X chromosome. Heterozygous cats are two-colored.

In cats, the genes for yellow and black color are located on the X chromosome. Heterozygous cats are two-colored. What offspring will be from crossing a two-colored cat with a black cat?

Let’s designate the chromosome containing the gene that causes the development of black hair in cats as XB, then the chromosome with the yellow hair gene as XC.

The two-tone color will be peculiar only to cats, their genotype will be written as – XBXC. The body of such a cat will produce XB and XC eggs.

The black cat will be XBY, it will produce sperm cells XB and Y.

The probable offspring of this pair of cats will look like this:

XВY – black cats, 25%;

XBXС – bicolor cats, 25%;

XBXB – black cats, 25%;

XСY – seals with yellow hair, 25%.