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If both parents of a male child are norm...

If both parents of a male child are normal,what are the chances of the child being colour blind ?

A

It is impossible

B

it is possibel only if mother's father was colour blind

C

It is possible only if father's mother was colour blind

D

It is possible even when all the four grand parents had normal vision

Text Solution

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The correct Answer is:
D
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