Which blood type is characterized by the presence of A and B antigens?

The blood type characterized by the presence of both A and B antigens is AB. In the ABO blood group system, individuals with type AB blood express both types of antigens on the surface of their red blood cells, which distinguishes them from other blood types.

This means that blood type AB individuals can receive blood from all other types (A, B, AB, and O) without experiencing a reaction, as they do not have antibodies against A or B antigens in their plasma. This unique characteristic highlights the importance of understanding blood group compatibility in transfusions and organ transplants.

Other blood types, such as A, B, and O, do not have both antigens present; type A has only A antigen, type B has only B antigen, and type O has neither antigen, which is why they do not qualify for this specific identification.