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The alleles for type A and type B blood are co

The alleles for type A and type B blood are co - type is AB...

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The alleles for type A and type B blood are co-dominant; that is, both  alleles are expressed.  However, the allele for type O blood is recessive to both type A and  type B.  Because a person has only two of the three alleles, the blood type  varies depending on which two alleles are present.  For instance, if a person has the A allele and the B allele, the blood 
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Unformatted text preview: type is AB. If a person has two A alleles, or one A and one O allele, the blood type is A. If a person has two B alleles or one B and one O allele, the blood type is B. If a person has two O alleles, the blood type is O....
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