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Inheritance of Red-Green Colour Blindness

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Question

A marriage between a colourblind man and a normal woman produces _______________.

A

All carrier daughters and normal sons

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B

50% Carrier daughters, 50% normal daughters

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C

50% Colourblind sons, 50% normal sons

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D

All carrier off springs

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Solution

The correct option is C All carrier daughters and normal sons
Colourblindness is a recessive sex-linked trait. Man is colourblind therefore his genotype is $X^{c} Y$ and woman is normal so her genotype is XX.
Hence, all carrier daughters and normal sons are produced.

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