السؤال 46

A poultry keeper claims that any two hens with the same feather colour must carry identical alleles for that gene. Why is the claim wrong?

Because feather colour always changes as a bird grows older
Because nothing at all can be said about alleles from the appearance of a bird
Because the dominant form can come from two different allele pairsالإجابة الصحيحة
Because hens with the same alleles always end up looking different

الشرح

A hen showing the dominant form may hold two dominant alleles or a mixed pair, so two birds of the same feather colour can hold different pairs. It goes too far to say nothing can be read from the way a bird looks, because a hen showing the recessive form has a genotype that its appearance does settle.

الشرح

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