a
A is dominant over B
b
O is recessive
c
B is dominant over O
d
A and B are co-dominant
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LAS00245
3 months ago
In the ABO blood group system:
A and B are co-dominant → if both are inherited, the person has blood group AB.
O is recessive → shows only if both alleles are O.
B is dominant over O → if B and O are inherited, the person has blood group B.

