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Mrs. And Mr. Doe have type A blood. Mrs.Jones also has type A blood, and Mr....

Mrs. And Mr. Doe have type A blood. Mrs.Jones also has type A blood, and Mr. Jones has type AB. Both Mrs. Doe and Mrs. Jones give birth to babies on the same day. Baby 1 has type O blood. Baby 2 has type B blood. Which baby belongs to which set of parents? Show Punnett squares to prove your answers.
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Answer #1

Answer: Baby 1 has type O blood, belongs to Mrs and Mr Doe. Baby 2 has type B blood, belongs to Mr and Mrs Jones.

Punnet Square for Mr and Mrs Doe

A O
A AA AO
O AO OO

AA = A type

AO = A type

OO = O type

The baby 1 has blood type O, that means the both of parents have one allele of O. That is possible only with Mr. and Mrs. Doe. The last combination of OO in the above punnet square will produce blood type O.

Punnet Square for Mrs and Mr Jones

A B
A AA AB
O AO BO

AA = A type

AB = AB type

AO = A type

BO = B type

Baby 2 has B type blood, this is possible with Jones family only.

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