Question

Name the four blood groups in human beings. On what basis are they named?

Answer 1

Blood groups:

1. Humans have four types of blood groups which are determined by the genes inherited from the parents.
2. They are blood group A, B, AB and O.
3. The blood grouping was first identified by Karl Landsteiner.
4. Erythrocytes contain the surface antigens A and B on the red blood cells.
5. They are classified based on the presence and absence of these antigens.

Blood groups	Presence of antigens
A	Antigen A
B	Antigen B
O	None
AB	Both A and B