NEET 2004 Biology question

A normal woman, whose father was colour-blind is married to a normal man. The sons would be :-

(1)50% colour-blindCorrect
(2)All normal
(3)All colour-blind
(4)75 % colour-blind

Answer: (1)

Solution

Colour blindness is X-linked recessive. The woman's father was colour-blind () and gave her his , so she is a normal carrier . Her husband is normal, . Cross: gives daughters

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Question ID VK-089443