Name the four main blood groups of blood.
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There are 4 main blood groups (types of blood) – A, B, AB and O. Your blood group is determined by the genes you inherit from your parents. Each group can be either RhD positive or RhD negative, which means in total there are 8 blood groups.
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1) A
1) A2) B
1) A2) B3) AB
1) A2) B3) AB4) O
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Why are there 4 blood types
The ABO System
Whether your blood type is A, B, AB or O depends on whether you have, or don't have, certain antigens (named A and B) on your red cells. The presence or absence of A or B antigens gives us four main blood types: A type blood has only A antigens on red blood cells
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