Class 12 NEET Biology Principles of Inheritance and Variation Questions Part 1

In question, where the genotype of the other parent is not mentioned then that should be considered normal. Colour blindness is a recessive sex- linkedtrait
(i) To find out the genotype of a woman.
Her father is colour-blind his genotype is X∘Y and her mother is normal so her genotype is XX. So, woman is carrier.
(ii) When this woman marries normal man → 50% of the sons would be colour blind.