Is it possible for michael and danielle to have a child who has type o blood? how do you know this?
was a switch made at the hospital? explain your reasoning.
how could fraternal twins be as different in appearance as michelle and michael, jr., including one having light skin and the other having dark skin?

It is not going to be possible to have a child that has type O blood. we can say this because Michael has a type of blood that is AB type and Danielle will be O type of blood. This implies that  he has type A and B
carbohydrate cells on his blood and she would have red blood cells which have neither A or B markers and her body will have both A and B antibodies. Now for the second question the answer is that Michelle and Michael Jr. acquired distinctive alleles of the qualities for skin shading. The introductory cell and the sperm conveyed distinctively to both of them