Both Ms. Smith and Ms. Jones had babies the same day in the same hospital. Ms. S

Question

Both Ms. Smith and Ms. Jones had babies the same day in the same hospital. Ms. Smith took home a baby girl. Whom she named Ashley. Ms. Jones took home a baby girl, whom she named Nicole. Ms. Jones began to suspect, however, that her child had been accidentally switched with the smith baby in the nursery. Blood tests were made: Mr. Smith was type A. Ms Smith was type B. Mr. Jones was type A. Ms Jones was A Ashely was type O, and Nicole was type B. Had a mix-up occurred? Explain giving the possible genotype of all involved.

Explanation / Answer

Yes. The Jones' baby could either be type O or type A , never type B. Neither Mr nor Mrs Jones had a B allele to donate to a child. Mrs Smith did, so she potentially could have had a type B baby

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