Standard minks have brown fur, while Aleutian minks are bluish gray. Both are homozygous

Standard minks have brown fur, while Aleutian minks are bluish gray. Both are homozygous, and the brown color is dominant. Which F1 offspring of these two breeds? What will be the result of crossing such hybrids among themselves? What will be the result of the age crossing of the Aleutian father with his hybrid daughter?

Let us designate the gene that causes the development of brown fur in minks as C, and the gene that leads to the development of bluish-gray fur as c.

Brown minks are homozygous by condition, we write them as CC. They produce germ cells – C.

Aleutian minks are also homozygous by condition, we write them as cc, and the germ cells produced by them – c.

When breeds are crossed with each other, we will get the same type of offspring – Cc, whose fur will be colored brown. Such minks already produce two types of germ cells – c and C.

If you cross mink hybrids with each other, the offspring will look like:

cubs are homozygotes with brown fur (CC) – 25%;

cubs – heterozygotes with brown fur (Cc) – 50%;

cubs with bluish-gray fur (сс) – 25%.

If you cross a male – Aleut (cc, sperm – c) with a female hybrid (Cc, eggs – c and C), the offspring will look like this:

50% of the cubs will have brown fur (Cc);

50% – Aleutian type fur (сс).