Red-Green Color Deficiency Is Due to a Recessive Gene on the X

Multiple Choice

 Red-green color deficiency is due to a recessive gene on the X chromosome. Women can be carriers or have color deficienty, and men are either color deficient or not. If an unaffected male and a female who is a carrier have children, what is your prediction as to the color deficiency status of their children?

A) Half of the couple's daughters, but none of their sons, are likely to have red-green color deficiency.
B) Half of the couple's sons, but none of their daughters, are likely to have red-green color deficiency.
C) None of the couple's children are likely to have red-green color deficiency.
D) All of the couple's children are likely to have red-green color deficiency.