Q. In the $ABO$ system of blood groups, if both antigens are present but no antibody, the blood group of the individual would be
ManipalManipal 2007
Solution:
Blood group
Antigen on RBC
Antibodies in serum
A
A
anti b
B
B
anti a
AB
A and B
-
O
-
anti a and anti b
Hence, blood group $AB$ has no antibodies in serum.
| Blood group | Antigen on RBC | Antibodies in serum |
|---|---|---|
| A | A | anti b |
| B | B | anti a |
| AB | A and B | - |
| O | - | anti a and anti b |