Answer to Question #313095 in Genetics for Molkio

Question

The female cat has black fur. The male cat has black fur. Figure out the phenotypes and genotypes of their possible kittens by using a Punnett Square.

Answer 1

Let's assume that the following alleles of gene A are responsible for different fur colors of cats:

A – black fur;

a – non-black fur.

There is complete dominance and also there is no sex linkage of this gene.

Suppose the female and male cats with black fur have the genotype Aa. Then the cross would look like this:

P1: Aa (♀, black fur) + Aa (♂, black fur)

↓ 

F1: AA (black fur) + Aa (black fur) + Aa (black fur) + aa (non-black fur)

A Punnett Square will be like this: