Genotype
Antigens
on RBCs
Antibodies
in Serum
Blood Group
I
A
I
A
or
I
A
i
A
Anti-B
A
I
B
I
B
or
I
B
i
B
Anti-A
B
I
A
I
B
A and B
neither
AB
i
i
neither
A and B
O
