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Inheritance of Haemophilia

If in haemoph...

Question

If in haemophilia both male and female are carrier ,what will be the condition of girl child ?

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Solution

Firstly, males cannot be carriers for sex linked genes. Now, considering the situation given, male is affected (X^hY) and female is carrier (X^hX). The cross is as follows:

X^h X

X^h X^hX^h XX^h

Y X^hY XY

The chances of girl being haemophilic is 50% and being a carrier is 50%.

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