Mary has type A blood and her husband (John) has type B blood. John's parents both had type AB. Mary and John have three children, one with type A, one with type AB, and one with type B. Relatives suspect that one of the children was adopted

Question

Mary has type A blood and her husband (John) has type B blood.  John's parents both had type AB. Mary and John have three children, one with type A, one with type AB, and one with type B. Relatives suspect that one of the children was adopted

aaronq · Answer

What is your question?

anonymous · Answer

Mary has type A blood and her husband (John) has type B blood. John's parents both had type AB. Mary and John have three children, one with type A, one with type AB, and one with type B. Relatives suspect that one of the children was adopted

aaronq · Answer

That is the exact same thing you typed before, it's a statement and not a question. What is the question asking for?

anonymous · Answer

Mary has type A blood and her husband (John) has type B blood.  John's parents both had type AB. Mary and John have three children, one with type A, one with type AB, and one with type B. Relatives suspect that one of the children was adopted. 

a.	What are Mary and John's blood genotypes?





b.	Which child was adopted?  Explain your answer.

aaronq · Answer

Have you got any idea? The hint is in "John's parents both had type AB", since he's B phenotype, what is his genotype?