DNA, RNA, and Genetics Question
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Hank and Marci each have a sister who expresses sickle cell anemia. Neither Hank nor Marci nor any of their parents have the disease, and none of them have been tested to determine if they are carriers. What is the probability that a child of Hank and Marci will have sickle cell anemia?
- 1/8
- 1/9
- 1/3
- 1/2