A normal woman, whose father was an albino, m | vedclass

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Question

(D) Albinism is an autosomal recessive trait. Let $A$ be the allele for normal pigmentation and $a$ be the allele for albinism.$1$. The woman's father

Vedclass · Accepted Answer

$1$ normal : $1$ albino

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(D) Albinism is an autosomal recessive trait. Let $A$ be the allele for normal pigmentation and $a$ be the allele for albinism.$1$. The woman's father was an albino $(aa)$, so she must have inherited an $a$ allele from him. Since she is normal, her genotype is $Aa$.$2$. The man is an albino, so his genotype is $aa$.$3$. The cross is $Aa$ (woman) $	imes$ $aa$ (man).$4$. The Punnett square results are: $Aa$ (normal), $Aa$ (normal), $aa$ (albino), $aa$ (albino).$5$. The ratio of normal to albino children is $2:2$, which simplifies to $1:1$.

$A$ normal woman, whose father was an albino, marries an albino man. What is the expected proportion of normal and albino children in their offspring?

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