What is the probability of having a color-bli | vedclass

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(D) Color blindness is an $X$-linked recessive disorder.Let the normal vision allele be $X^C$ and the color-blind allele be $X^c$.$A$ normal male is $

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Possible if the mother's father is color-blind.

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(D) Color blindness is an $X$-linked recessive disorder.Let the normal vision allele be $X^C$ and the color-blind allele be $X^c$.$A$ normal male is $X^CY$ and a normal female is $X^CX^C$ or $X^CX^c$ (carrier).If the mother is a carrier $(X^CX^c)$ and the father is normal $(X^CY)$,the cross is $X^CX^c 	imes X^CY$.The offspring genotypes are $X^CX^C$ (normal female),$X^CX^c$ (carrier female),$X^CY$ (normal male),and $X^cY$ (color-blind male).Thus,a color-blind male child is possible if the mother is a carrier. $A$ woman is a carrier if her father was color-blind (since she receives one $X$ chromosome from her father).

What is the probability of having a color-blind male child from two normal parents?

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