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Solution


Q.

If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is           [2016]
1 0  
2 0.5  
3 0.75  
4 1  

Ans.

(1)

Genotype of colour blind man – XcY
Genotype of woman homozygous – XX
for normal woman

Hence, there is zero (0) probability of their son to be colour-blind.