Blood Types: ABO System, Red Blood Cell Antigens & Blood Groups

Blood Type Genotypes | Characteristics, Inheritance & Transfusion

Blood Type Inheritance in Humans | Overview & Patterns

Type O Blood: O and O- Blood Types - Bloodworks Northwest

Human Blood Facts: Why Blood Type O Positive Is More Common Than AB Negative

Why Some People Believe That This Blood Type Means You Have Alien DNA

How Does the Rh Factor Affect Pregnancies? | Britannica

Blood Type Genetics | Definition & Punnett Square Examples