Question

Red-green color blindness is caused by an X-linked recessive gene. In a family, the mother is a carrier of this gene while the father does not have the gene. What are the possible effects on their children?
Half of the daughters are normal and half of the daughters are color-blind.
Half of the boys are normal and half of the boys are color-blind.
Half of the boys are color-blind and half of the girls are color-blind.

Answer 1

Color blindness in an x link gene and the blindness itself is recessive, so it would beB. Also, girls cannot be color-blind. So the answer is "Half of the boys are normal and half of the boys are color-blind.

Answer 2

thanks @EclipsedStar

Answer 3

No problem ^w^