Question

What type of inheritance controls blood types in humans?

Answer 1

Blood type:

1. Blood type is inherited through an inheritance pattern called codominance.
2. In humans, red blood cells have proteins with sugars attached to the surface of red blood cells.
3. These sugars act as antigens, structures that can activate the immune system.
4. Those antigens come in two forms: type A antigens and type B antigens.
5. People who have type A blood make A antigens and have anti-B antibodies in the plasma.
6. People who have type B blood make B antigens and have anti-A antibodies in the plasma.
7. People who have type AB blood make both types of antigens but no antibodies.
8. People can also have type O blood that has no antigens, but both anti-A and anti-B antibodies in the plasma.
9. The gene I regulates the ABO blood types in humans. I^a, I, and i are its three alleles with i being recessive producing no antigens.
10. Six distinct genotypes are possible because there are three different alleles.

1. The table below reflects a summary of these details.