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12 January, 09:53

How can humans have 1 of 4 different blood types?

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  1. 12 January, 13:30
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    Blood type is an example of multiple alleles. That means there are more than 2 genes for a particular trait.

    Explanation: A person can inherit:

    AA or AO and be type A blood

    BB or BO and be type B blood

    AB and be type AB blood

    OO and be type O blood
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