Why is blood type considerd a form of codominace

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they inherited a recessive O allele from both parents. The A and B alleles are codominant. Therefore, if an A is inherited from one parent and a B from the other, the phenotype will be AB. Agglutination tests will show that these individuals have the characteristics of both type A and type B blood.

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answer; i believe that the correct answer is (lung);

voluntary muscles are controlled by the cerebellum.