A person's blood type is determined by the

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A person's blood type is determined by the presence of antigens (specific glycoproteins) on the surface of the red blood cells. These antigens are recognized by the immune system and can cause a reaction if the wrong blood type is transfused into a person. The most well-known blood types are ABO and Rh, which are both determined by the presence or absence of specific antigens. The chemical character of hemoglobin (C) can affect the function of red blood cells, but it does not determine blood type. The size, volume, and shape of red blood cells (A, B, and E) can vary between individuals but also do not determine blood type.

A Person's Blood Type Is Determined by the