Blood Type Genetics: How It Works

Ever wondered why you are O Positive while your parents are A and B? It's all high school biology.

The ABO System

You inherit one gene from your mother and one from your father.

• A and B are dominant genes.
• O is recessive.

Combinations

Examples:

• Parent A (AO) + Parent B (BO) = Can result in child being A, B, AB, or O!
• Parent O (OO) + Parent O (OO) = Child will ALWAYS be O.
• Parent AB + Parent O = Child can be A or B, but never O.

This genetic puzzle ensures diversity in the human population, which is essential for survival—but makes finding rare matches a challenge!