What kittens can be if the cat is black (recessive), and the cat is black and red (tortie)? Find the descendants of the first generation

It is generally known that the gene that determines the color of the fur of cats is inherited in the X chromosome.

Individuals of tortoiseshell color are heterozygous due to the action of the principle of incomplete dominance or the intermediate principle of inheritance of a trait.

Let’s designate the gene that causes the development of black hair in cats in the X chromosome as X b, the chromosome with the red hair gene as X B. Cats with the heterozygous XB X b genotype have tortoiseshell hair.

A tortoiseshell cat with genotype XB X b produces two types of eggs – XB and X b.

The black cat has the genotype X b Y and produces sperm cells X b and Y.

The offspring from crossing the described animals with each other will be represented by the following possible options:

cats with tortoiseshell coat (XB X b) – 25%;

cats with black hair (X b X b) – 25%;

seals with red hair (XB Y) – 25%;

seals with black wool (X b Y) – 25%.