The gene for haemophilia is located on the X | vedclass

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(D) The correct answer is $D$. Haemophilia is an $X$-linked recessive disorder. In males,there is only one $X$ chromosome. If a male is haemophilic,hi

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haemophilic father to pass the gene to his son

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(D) The correct answer is $D$. Haemophilia is an $X$-linked recessive disorder. In males,there is only one $X$ chromosome. If a male is haemophilic,his genotype is $X^hY$. During reproduction,a father passes his $Y$ chromosome to his son and his $X$ chromosome to his daughter. Therefore,a haemophilic father $(X^hY)$ will always pass his $Y$ chromosome to his son,meaning he cannot pass the haemophilia gene to his son.

The gene for haemophilia is located on the $X$ chromosome. Hence,it is normally impossible for a:

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