Blood Types Chart: Genotypes and Phenotypes Explained

| Blood Type | Genotype | Phenotype |

|---|---|---|

| A+ | AA or AO | A antigen |

| A- | AA or AO | A antigen |

| B+ | BB or BO | B antigen |

| B- | BB or BO | B antigen |

| AB+ | AB | A and B antigens |

| AB- | AB | A and B antigens |

| O+ | OO | Neither A nor B antigens |

| O- | OO | Neither A nor B antigens |

The genotype refers to the combination of alleles inherited from both parents, while the phenotype refers to the observable expression of those alleles.