A couple brings home their new, nonidentical twin daughters, Joan and Jill. After several months, the father begins to suspect that there was a mix-up at the hospital, because Jill doesn’t look much like either parent or like her sister. When the twins blood tests come back, the father calls his lawyer to start a lawsuit against the hospital. The mother, father, and Joan have type A blood, but Jill has type O blood. Does the father have a case? Explain your answer. (The gene for blood type has three alleles: A, B, and O. The A and B alleles are codominant, and the O allele is recessive.)

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    Yes, because people with type A blood can pass on only A alleles to their children.
    Yes, because all of this couple’s children will have type A blood.
    No, because parents with any blood type (A, B, AB, or O) can produce children with type O blood.
    No, because parents with type A blood can have a child with type O blood.

asked May 30, 2013 in Biology by anonymous
    

1 Answer

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No, because parents with type A blood can have a child with type O blood.
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)

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