In what proportion will the phenotype splitting of the offspring obtained from the crossing of a heterozygous

In what proportion will the phenotype splitting of the offspring obtained from the crossing of a heterozygous gray Karatul ram with the same sheep occur, if homozygotes for the dominant gene are lethal?

Let’s designate the gene that determines the gray color of the Karakul ram’s wool as C, then the gene for the wool of a different color will be c.

Heterozygous rams and sheep have a gray coat, we write them as Cc. Such animals produce two types of germ cells – C and c.

When crossing them together, offspring is obtained, including the following options:

heterozygous lambs with gray hair (Cc);

homozygous lambs with wool of a different, recessive color (cc).

SS homozygotes, according to the condition, will die.

The phenotypic cleavage is 2: 1.