Why do we have blood groups
Answers
Answered by
0
Human blood types most likely came to exist to fend off infectious diseases. ... Type B is thought to have originated some 3.5 million years ago, from a genetic mutation that modified one of the sugars that sit on the surface of red blood cells.
Answered by
0
Answer:
A blood group is defined as the classification of blood based on the presence or absence of inherited antigenic substances on the surface of red blood cells (RBCs). Examples of the main blood group are A+, A-,B+,B-,O+,O-,AB+,AB- ..there might be others but they are very rare.
Similar questions