What will be the inheritance pattern of color | vedclass

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(A) Color blindness is an $X$-linked recessive disorder. Let $X^C$ be the normal allele and $X^c$ be the recessive allele for color blindness. The fat

Vedclass · Accepted Answer

Son - $50\%$,Daughter - $Nil$

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(A) Color blindness is an $X$-linked recessive disorder. Let $X^C$ be the normal allele and $X^c$ be the recessive allele for color blindness. The father has normal vision,so his genotype is $X^CY$. The mother is a carrier,so her genotype is $X^CX^c$. Crossing: $X^CY 	imes X^CX^c$. Possible offspring genotypes: $1. X^CX^C$ (Normal daughter) $2. X^CX^c$ (Carrier daughter) $3. X^CY$ (Normal son) $4. X^cY$ (Color blind son) Out of the sons,$50\%$ are color blind $(X^cY)$ and $50\%$ are normal $(X^CY)$. Out of the daughters,$0\%$ are color blind,as they are either normal or carriers. Therefore,the probability of color-blind sons is $50\%$ and color-blind daughters is $Nil$.

What will be the inheritance pattern of color blindness in children born to parents with normal vision,where the mother is a carrier for the color blindness gene?

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