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    What blood group is caused by recessive multiple alleles?

    Question #112279. Asked by clarod. (Jan 21 10 11:39 AM)


    Juggernaut314

    		That'd be blood group O.

    The presence of A and B antigens are co-dominate, and the type referred to as O indicates the lack of either of those antigens.

    So, anybody with an A and an O, an A and a B, or two As will express blood type A or AB. The same holds if you replace every instance of A with B. Thus, having two Os is the only way to be type O.

    More info here: http://en.wikipedia.org/wiki/Dominance_%28genetics%29#Multiple_alleles

    Jan 21 10, 11:45 AM

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