A woman whose father was an albino marries an | vedclass

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Question

(D) Albinism is an autosomal recessive trait. Let $A$ be the dominant allele for normal skin pigmentation and $a$ be the recessive allele for albinism

Vedclass · Accepted Answer

$1$ Normal : $1$ Albino

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(D) Albinism is an autosomal recessive trait. Let $A$ be the dominant allele for normal skin pigmentation and $a$ be the recessive allele for albinism.$1$. The woman's father was an albino $(aa)$,so she must have inherited one recessive allele $(a)$ from him. Since she is phenotypically normal,her genotype must be $Aa$.$2$. The man is an albino,so his genotype must be $aa$.$3$. The cross between the woman $(Aa)$ and the man $(aa)$ is: $Aa 	imes aa$.$4$. The resulting offspring genotypes are $Aa$ (Normal) and $aa$ (Albino) in a $1:1$ ratio.Therefore,the ratio of their offspring will be $1$ Normal : $1$ Albino.

$A$ woman whose father was an albino marries an albino man. What will be the ratio of their offspring?

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