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OpenStudy (anonymous):
John and Sarah are contemplating having children, but both have a family history of Tay Sach's Disease, which is lethal usually by the age of 2 or 3 years. John had a brother die of Tay Sach's and Sarah's great grandparents (on her father's side) had a daughter die of the disease. All other members of the family are healthy. What is the probability that John and Sarah's first child will be affected with Tay Sachs? (Be sure to completely reduce your answer.)
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OpenStudy (beccaboo333):
What do youthink ?
OpenStudy (anonymous):
1/36
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