A normal male marries a female who is a carrier of colour blindness. What is the possibility of this couple having a son suffering from colour blindness?

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50%

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75%

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100%

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Solution

The correct option is B
50%

Since the female is a carrier, her genotype will be XhX. The male will be XY. Therefore there will be a 50% chance of the sons being colour blind and 50% chance of the sons being normal

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A normal couple (not suffering from colour blindness) has a colour blind child. What are the possible genotypes of the couple?

(X^{c} Y)

(X^{C} X^{c})

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