Question

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?

Answer 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

Answer 2

Wait what?

Answer 3

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