A guinea pig, with a black color and long hair, was crossed with a guinea pig, which has a brown coat and short hair.

A guinea pig, with a black color and long hair, was crossed with a guinea pig, which has a brown coat and short hair. What offspring by genotype and phonotypist can be expected from this crossing if the parents are homozygous for both pairs of alleles. Black color and long hair are dominant features.

Let’s designate the gene for black hair of guinea pigs as K, then the gene for brown hair of these animals will be k.

Let’s designate the gene for long hair of guinea pigs as L, then the gene for short hair will be l.

A guinea pig with long black hair, according to the condition of the problem, is homozygous for both traits – KKLL. It produces KL germ cells.

The brown shorthaired guinea pig is also homozygous – kkll. It produces kl germ cells.

All offspring will be uniform and represented by diheterozygous KkLl pups with long black hair.