![]() What other combinations can occur? Emory University School of Medicine put together this chart: Parent #1’s alleles However, there is a 25% chance they could have a baby with the blood type O (with inheritance of the OO alleles), and a 25% chance they could have a baby with an AB blood type (with inheritance of the A allele from the mother and the B allele from the father).” “For example, an AO mother will have blood type A, and a BO father will have blood type B. So if a woman with OO alleles has a baby with a man who has BB alleles, the baby will have a B blood type.Ĭan a baby ever have a blood type different from its parents? “There are certain scenarios in which we find discrepancies in our blood typing,” Dr. The O allele is considered recessive, which means it’s not always expressed. Your blood type is inherited from your parents-and you can’t change it any more than you can change your eye color.Įach parent contributes one of their two A, B, or O alleles (a form of a gene) to a baby’s blood type. “This can occur in a person with a blood cancer, for example, or in someone who has had a recent blood transfusion or stem cell transplant.” What your blood type says about you What does your blood type say about your heritage? “There are certain scenarios in which we find discrepancies in our blood typing,” says Deva Sharma, MD, MS, a hematologist-oncologist at Vanderbilt University Medical Center in Nashville. ![]() You then match what you see on the card to a provided guide. These tests usually involve pricking your finger and putting a drop of blood on a chemically treated card that looks for antigens and the Rh factor.
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