Genetics

Both Mrs. Smith and Mrs. Jones had babies the same day in the same hospital. Mrs. Smith took home a baby girl, whom she named Shirley. Mrs. Jones took home a baby girl, whom she named Jane. Mrs. 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, Mrs. Smith was type B, Mr. Jones was type A, Mrs. Jones was type A, Shirley was type O, and Jane was type B. Had a mix-up occurred?

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  1. the only type B among the parents is Mrs. Smith
    ... B is co-dominant with A

    type O is recessive ... so A could be AO , and B could be BO
    ... either set of parents MIGHT have had a type O offspring

    but only the Smiths could have a type B offspring
    ... Jane must be BO ... B from mom , O from dad

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  2. Wait what?

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  3. Wow connexSUS has upgraded big time!! why don't they that same upgrade on their school.

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