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27 February, 12:50

A woman with normal blood clotting ability whose father was a hemophiliac and whose mother was normal with no family history of hemophilia marries a man whose blood has normal clotting ability. Recall that hemophilia is an X-linked trait. What is the probability that their first child will be a daughter with hemophilia? Round your answer properly to 3 decimal digits.

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  1. 27 February, 14:26
    0
    0.

    Explanation:

    X - linked recessive trait may be defined as the trait that are generally transmitted from the mother to the son. The daughter can express the trait in homozygous recessive condition only.

    The woman is heterozygous for the hemophilia condition as his father is haemophilic. She marries with a man that has normal blood clotting. The cross between them is as follows:

    Parents: XhX and XY

    Progeny : XhX, XX, XhY and XY.

    No, daughter will be affected by the hemophilia.

    Thus, the answer is 0.
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