What will be the percentage of affected sons, | vedclass

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(A) Colour blindness is an $X$-linked recessive disorder.Let $X^C$ be the allele for colour blindness and $X$ be the normal allele.The father is colou

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(A) Colour blindness is an $X$-linked recessive disorder.Let $X^C$ be the allele for colour blindness and $X$ be the normal allele.The father is colour-blind,so his genotype is $X^C Y$.The mother is normal,so her genotype is $X X$.When these parents cross: $X^C Y 	imes X X$.The possible offspring genotypes are:$1$. $X X^C$ (Carrier daughter)$2$. $X X^C$ (Carrier daughter)$3$. $X Y$ (Normal son)$4$. $X Y$ (Normal son)Since all sons receive their $X$ chromosome from their mother and $Y$ chromosome from their father,and the mother is normal $(X X)$,all sons will be normal.Therefore,the percentage of affected sons is $0 \%$.

What will be the percentage of affected sons,whose father is colour-blind and mother is normal (in $\%$)?

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