If all the sons are haemophilic and all the d | vedclass

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Question

(B) Haemophilia is typically an $X$-linked recessive disorder. However,the question describes a scenario where a haemophilic father $(X^hY)$ mates wit

Vedclass · Accepted Answer

$Y$-linked

Vedclass · Answer

(B) Haemophilia is typically an $X$-linked recessive disorder. However,the question describes a scenario where a haemophilic father $(X^hY)$ mates with a normal mother $(XX)$. In this case,the father passes his $Y$ chromosome to all his sons and his $X^h$ chromosome to all his daughters. If the trait were $X$-linked recessive,the daughters would be carriers $(X^hX)$ and the sons would be normal $(XY)$. Since the question states all sons are haemophilic and daughters are normal,this indicates the trait is passed from father to son via the $Y$ chromosome. Therefore,this character is $Y$-linked (holandric).

If all the sons are haemophilic and all the daughters are normal when a haemophilic father mates with a normal mother,this character is:

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