In mice, the A (Y) allele is known, which in a heterozygous state determines the development of a yellow body coloration

In mice, the A (Y) allele is known, which in a heterozygous state determines the development of a yellow body coloration, and in a homozygous state it is lethal. The recessive allele of this gene in a homozygous state determines the development of black coloration. What offspring and in what numerical ratio can be expected from the crossing of two yellow short-tailed mice (about the features of tail length inheritance, see the previous problem)?

2/9 yellow with normal tails, 4/9 yellow with short tails, 1/9 black with normal tails, and 2/9 black with short tails.

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