I need some science help?!?

Question

Problem
Mrs.Iben and Mrs.Iten shared a room at the hospital when they had their babies, and now they suspect their babies have been accidentally switched. The hospital performed blood tests that showed the following blood types: Mrs.Iben, AB; Mr.Iben, O; Mrs Iten, A; Mr Iten, A; Baby 1, A; Baby 2, O. Based on the blood types, can you determine which baby belongs to each set of parents?

Analize and Conclude
1. What are the possible Genotypes Mr. and Mrs. Iben?
2. What are the possible genotypes of children born to Mr. and Mrs. Iben
3. What are the possible genotypes of Mr. and Mrs.Iten
4. What are the possible genotypes of children born to Mr. and Mrs.Iten?
5. Which baby, baby 1 or baby 2, belongs to Mr. and Mrs. Iben? Which baby belongs to Mr and Mrs.Iten?

Answer 1

Make a pedigree for each family to visualize the inheritance.
1. Iben family AB x OO are the parents (no other possibilities)
2. Kids could be AO or BO which are Type A or Type B.
3. Mrs. Iten could be AA or AO for blood type A. Mr. Iten could be AA or AO for blood type A.
4. Iten children could be AA or AO or OO which are Type A or Type O.
5. This means that the only family that could have a Type O child is the Iten family.
Baby 1 belongs to the Ibens.
Baby 2 belongs to the Itens.

Answer 2

1. Mr. Iben has to be OO :: Mrs. Iben has to be AB
2. AO or BO

AO yields type A blood.
BO yields type B blood.
So their baby could have either type A or Type B blood but not type O blood. Baby 2 cannot be theirs so baby 1 must be.

3. Mr. Iten could be either AA or AO.
Mrs Iten could also be either AA or AO.

4.. AA or AO or OO.

AA yields type A blood
AO yields type A blood
OO yields type O blood
So their baby could have type A or type O blood.

5. So Baby 2 has to belong to Mr. and Mrs Iten. That leaves baby 1 who has to belong to Mr. and Mrs. Iben.