In determining the phenotype for the ABO blood system:
$A$ and $B$ are dominant over $O$
$A$ and $B$ are both dominant
$O$ is recessive
All of these

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***D*** ∻Key Concept∻ ⚹ABO blood system inheritance⚹ ∻Explanation∻ ⚹The ABO blood system is determined by the presence of antigens on the surface of red blood cells. The alleles $A$ and $B$ are both dominant over $O$, and $O$ is recessive. Therefore, all the given statements are correct.⚹◊What role do dominant and recessive alleles play in determining blood type in the ABO blood system?⍭ Generate me a similar question◊

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