If a colourblind woman marries a normal man w | vedclass

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Question

(B) Colour blindness is an $X$-linked recessive disorder.Let $X^c$ represent the allele for colour blindness and $X$ represent the normal allele.$A$ c

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$100$

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(B) Colour blindness is an $X$-linked recessive disorder.Let $X^c$ represent the allele for colour blindness and $X$ represent the normal allele.$A$ colourblind woman has the genotype $X^c X^c$.$A$ normal man has the genotype $XY$. Since his father was colourblind,it does not affect his genotype because the $Y$ chromosome is inherited from the father and the $X$ chromosome from the mother. Thus,the man remains $XY$.Crossing $X^c X^c$ (woman) with $XY$ (man):Offspring genotypes: $X^c X$ (carrier daughter),$X^c Y$ (colourblind son).All sons will receive the $X^c$ chromosome from the mother and the $Y$ chromosome from the father.Therefore,$100 \%$ of their sons will be colourblind.

If a colourblind woman marries a normal man whose father was colourblind,what are the chances of their son being colourblind (in $\%$)?

Similar Questions

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$A$ woman carrying two genes for haemophilia and one gene for colour blindness on one of her $X$ chromosomes marries a normal man. What will be the phenotype of the progeny?

What is the full form of $PKU$?

$A$: The possibility of a female becoming a haemophilic is extremely rare.
$R$: Mother of such a female has to be a carrier and the father should be haemophilic.

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