Blood type knowledge In medicine, blood types are generally divided into six types: AA, OA, BB, OB, AB, and O. Type AA and OA are collectively referred to as type A, and type BB and OB are also collectively referred to as type B.
The blood type of a child is a new blood type formed by mixing a part of the father's blood type (A, B, or O) with a part of the mother's blood type (A, B, or O). This new blood type is the child's blood type, so the child's blood type is related to the parent's blood type.
The relationship between children's blood type and parents' blood type
| Parental blood type | Child's possible blood type | Child's impossible blood type |
|---|---|---|
| A × A | A, O | B, AB |
| A × B | A, B, AB, O | - |
| A × AB | A, B, AB | O |
| A × O | A, O | B, AB |
| B × B | B, O | A, AB |
| B × AB | A, B, AB | O |
| B × O | B, O | A, AB |
| AB × AB | A, B, AB | O |
| AB × O | A, B | AB, O |
| O × O | O | A, B, AB |