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25 February, 07:45

A woman with type o blood is expecting a child. her husband is type

a. both the woman's father and her husband's father had type b blood. what is the probability that the child will have type o blood?

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  1. 25 February, 08:09
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    Woman's genotype: ii

    Husband's genotype: I^A i

    -> possible husband's father genotypes are two I^B and I^B i

    -> if husband's father has two I^B alleles, the husband will have one I^B allele present, which is not the case. So, there is i allele present. (can also infer that I^A comes from husband's mother)

    Child's possible genotypes:

    ii, ii, I^A i, I^A i

    probability is 1/2
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