Kamis, 21 Januari 2010

Genetics problem

Karen and Steve each have a sibling with sickle-cell disease. Neither Karen nor Steve nor any of their parents have the disease, and none of them have been tested to reveal the sickle-cell trait. Based on this incomplete information, calculate the probability that if this couple has a child, the child will have sickle-cell disease.

I'll post a comment about what the answer is not. See what answer you get first.

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