MICROANATOMY

Detailed explanation-1: -Answer and Explanation: Yes, it is possible for a couple whose blood groups are A and B to bear a child with blood group O. A couple that is both heterozygous for type A and type B blood can bear a child with type O blood. If both parents are heterozygous, then they have the recessive gene for type O blood.

Detailed explanation-2: -The final frequencies of each genetic combination are ¼. Hence, the man with blood group A and women with blood group B can have a child with blood group O with probability ¼.

Detailed explanation-3: -An O and B crossing can not produce an A or AB child. An AB with an O can produce A children or B children but not O. In short the ABO system can prove you are not a parent but not that you are, as there are millions of other people with the same blood group.

Detailed explanation-4: -Even though both parents still have blood type A, Dad can pass on either his A or his O gene version. Mom can also either pass on her A or her O. Because of this, you can see that there’s 1 in 4 or 25% chance for a child to have OO, or blood type O.