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

question 100

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.

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