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A man with blood group A marries a woman...

A man with blood group A marries a woman with blood group O and their daughter has blood group O. Is this information enough to tell you which of the traits – blood group A or O – is dominant? Why or why not?

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No. This information is not sufficient to determine which of the traits - blood group A or O - is dominant. Thus is because we do not know about the blood group of all the progent. Blood group A can be genotypically AA of AO. Hence, the information is incomplete to draw any such conclusion.
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Knowledge Check

  • A man with blood group 'AB' marries a women with 'O' blood groups, In this situation:

    A
    the blood group of the children differs from both the parents
    B
    the blood group orf theior children will be the same as that of the mother
    C
    while `50%` of the children will have father's blood group, the remaining will have the mother's blood groups
    D
    none of the above

  • A man with blood group B and woman with blood group O, will have children with blood group

    A
    B or O
    B
    AB, A, B or O
    C
    AB or O
    D
    A or O

  • A man with blood group 'A' marries a woman with blood group 'B'. What are all the possible blood groups of their offspring's?

    A
    A, B, AB and O
    B
    O only
    C
    A and B only
    D
    A, B and AB only
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