contestada

Albinism is an autosomal recessive condition. Which answer choice shows the genotypic ratio when an albino female mates with a male that is heterozygous for the
albinism trait?
O AA: 2 Aa: 2 aa
1 AA: 2 Aa: 1 aa
2 AA: 2 Aa: O aa
2 AA: O Aa:2 aa

Respuesta :

Answer:

The correct answer is - O AA: 2 Aa: 2 aa

Explanation:

In the given question there is an albino mother (aa), and a heterozygous male or father (Aa) crossed to generate offspring, the genotypic ration in between by this cross would be :

Gametes:

Albino mother - a, a

heterozygous male - A and a

Cross:

        a      a

A     Aa     Aa

a       aa      aa

Thus there are 2 heterozygous and two albino and no true breeding dominant present thus, the correct answer would be - O AA: 2 Aa: 2 aa

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