Blood Type

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Every person's blood has 2 markers called ABO alleles. Each of the markers is represented by one of three letters: A, B, or O. This gives six possible combinations of these alleles that a person can have, each of them resulting in a particular ABO blood type for that person. Combination ABO Blood Type AA A AB AB AO A BB B BO B OO O Likewise, every person has two alleles for the

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