Given below are two statements: one is labelled Assertion(A) and other is labelled Reason(R).
Assertion (A): The possibility of a female becoming a haemophilic is extremely rare.
Reason (R): Mother of such a female has to be at least carrier and the father should be haemophilic (unviable in the later stage of life).
In the light of above statements, choose the correct answer from the options given below.

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Both A and R are true, R is the correct explanation of A

Both A and R are true, but R is not the correct explanation of A

A is true, but R is false

Both A and R are false

answer is A.

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Detailed Solution

The chances of female to have haemophilia is rare because both of the X chromosomes should show recessive allele. Compared to female, male has more chance of showing haemophilia as a single copy of recessive allele present on its X chromosome results in haemophilia. female can be haemophilic when her mother is a carrier and father is haemophilic( not viable).

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