How to decide and project your child's blood type?

Each biological parent donates one of the two A/B/O alleles to his/her child. Alleles are possible types of a particular gene, in this case the blood type gene. There are two basic blood type genes: A, B, and O which codes for A, B or none of the RBC surface antigens that decide corresponding blood types respectively. Children have two alleles, one inherited from each parent. The possible combinations of the three alleles are OO, AO, BO, AB, AA, and BB. The blood group that your child belong to, depends on what types and combinations of alleles you have inherited from your parents.

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