In cats, genes for red and black are allelic and localized on the X chromosome. they are transmitted

In cats, genes for red and black are allelic and localized on the X chromosome. they are transmitted independently and therefore they are heterozygous and have a variegated color. How many different phenotypes can be obtained by crossing a 3-color cat with a black cat. what is the percentage of the appearance of a tricolor cat

Let’s designate the gene for red hair in cats as b, and the chromosome containing it as Xb. The chromosome with the gene that determines the development of black wool will be designated as XB. Only cats as representatives of the homogametic sex – XBXb can be motley. They produce XB and Xb germ cells.

The black cat will be XBY, and the sperm it produces will be Xb and Y.

As a result of the relationship of a tricolor cat with a black cat, the following offspring options can be obtained:

25% female motley kittens – XBXb;

25% female ginger kittens – XbXb;

25% male ginger kittens – XbY;

25% male black kittens are XBY.

Answer: 4 phenotypic variants; the probability of giving birth to a tricolor cat is 0%.