In minks, fur coloration is determined by the interaction of two complementary genes, and a different combination

In minks, fur coloration is determined by the interaction of two complementary genes, and a different combination of dominant and recessive alleles causes different manifestations of coloration. If both genes A_B_ are in a dominant state, then the color of the fur will be brown, if only one gene A_ is in the dominant state, it is gray, if only one gene B_ is beige, if both genes are in a recessive state, it is cream. What is the likelihood of creamy minks when crossing beige minks?

The likelihood of the appearance of cream minks if beige minks are crossed:
a) if the genotypes of the crossed individuals BBaa or BBaa and Bbaa – 0%;
b) if the genotypes of the crossed individuals Bbaa – 25%.

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