Mrs. Doe and Mrs. Roe had babies at the same hospital. Mrs. Doe took home a girl, Nancy, and Mrs. Roe took home a boy, Richard. However, Mrs. Roe was sure she had a girl and brought suit against the hospital. Blood tests showed that Mr. Roe was type O, Mrs. Roe was type AB, and Mr. and Mrs. Doe were both type B. Nancy was type A and Richard was type O. Had an exchange occurred?
Write the alleles as:
Type O – ii
Type AB - IAIB
Type B – IBIB or IBi
Type A - IAIA or IAi
Answers: 2
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