| LIST I (Phenotype) | LIST II (Antibodies) | ||
|---|---|---|---|
| A | O | I | Anti-A |
| B | A | II | None |
| C | B | III | Anti-B |
| D | AB | IV | Anti-A and Anti-B |
Blood phenotypes are characterized by their antibody production: Type O produces Anti-A and Anti-B; Type A produces Anti-B; Type B produces Anti-A; and Type AB produces no antibodies. This information is crucial for precise blood typing in transfusions.