Color Blindness Is Caused by an X-Linked Recessive Gene

question 17

Multiple Choice

Color blindness is caused by an X-linked recessive gene.A color-blind man and a woman with normal vision whose father was color blind have a son.The probability that their son is color blind is:

• A)0)25 (or 25 percent).
• B)0)50 (or 50 percent).
• C)0)75 (or 75 percent).
• D)1)00 (or 100 percent).
• E)none of these.

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