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5 July, 05:32

Jack is O - blood type and his wife Jill is AB + blood type. Jill's father has B - blood type. What percentage of their children are expected to have A - blood type?

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  1. 5 July, 08:43
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    There is 25% chances for delivering a baby with A-ve.

    Explanation:

    AB + is a dominant blood group and O is a recessive blood group. To understand that Jill has AB + blood type with her father having B - blood type she should have acquired her AB + from her mother who had A + blood type.

    When mother has this dominant AB + blood type and father with the O - Recessive blood type there are likely chances only for the dominant alleles to take charge over the recessive ones. Hence there is a chance of the babies to have both A-, A + blood group and B + ve or B - ve blood group.

    As the mother has her Rh - ve inscribed in her DNA from her father she is a carrier and when joined with Rh - ve from her husband there are 25% chances for delivering a baby with A-ve.
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