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19 March, 19:34

Peter is a 30-year old man whose father died of Huntington's disease. Neither Peter's mother nor a much older sister show any signs of Huntington's. What is the probability that Peter has inherited Huntington's disease?

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  1. 19 March, 19:36
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    50%

    Explanation:

    Huntington's disease is an autosomal dominant disorder that leads to progressive brain impairment and cognitive problems

    The probability that Peter can inherit this disease from his father is 50% (who is carrier of the defective allele), having into account that no sign of this disorder is observed from the mother's family
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