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  • A man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind?<div class='q

A man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind?

Option: 1

25%


Option: 2

0%


Option: 3

50%


Option: 4

75%


Answers (1)

best_answer

As colour blindness is an autosomal recessive genetic disorder, for it is present at X -chromosome. Thus, according to the situation given in the question, a man whose father was colour blind (will be, i.e, XY normal) marries a woman whose mother was colour blind and father was normal (i.e, this woman will be a carrier) according to the cross given below.

Thus, when marriage will happen between a normal man and a carrier woman, in that case, percentage of a male child to be colour blind is 25% (this can be easily observed from the cross given below)

 

Posted by

Ritika Harsh

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