Respuesta :
Answer: Human blood type is determined by three alleles --- A, B, and O. Both A and B alleles are dominant, while O is recessive. This means that a person can have two copies of the same allele or one copy of each allele for their blood type. The combination of alleles determines the antigens that are present on the surface of the red blood cells. Antigens are molecules that can trigger an immune response from the body. The following table shows the possible blood types and alleles, as well as the antigens and antibodies associated with each type.
Explanation:
| Blood Type | Alleles | Antigens | Antibodies |
|------------|------------|----------|------------|
| A | AA or AO | A | Anti-B |
| B | BB or BO | B | Anti-A |
| AB | AB | A and B | None |
| O | OO | None | Anti-A and Anti-B |
