A: The possibility of a female becoming a hae | vedclass

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(A) Haemophilia is an $X$-linked recessive disorder.For a female to be haemophilic (genotype $X^hX^h$),she must inherit one recessive allele $(X^h)$ f

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Assertion and Reason both are correct and Reason is the correct explanation of Assertion.

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(A) Haemophilia is an $X$-linked recessive disorder.For a female to be haemophilic (genotype $X^hX^h$),she must inherit one recessive allele $(X^h)$ from her mother and one recessive allele $(X^h)$ from her father.This means the father must be haemophilic $(X^hY)$ and the mother must be either a carrier $(X^HX^h)$ or haemophilic $(X^hX^h)$.Since the condition is rare,the probability of both parents carrying the gene is very low,making the occurrence of a haemophilic female extremely rare.Thus,both the Assertion and the Reason are correct,and the Reason explains why the condition is rare in females.

$A$: 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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$A$: 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.