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.