Can a child have blood group 'O' if his parents have blood group 'A' and 'B' Explain.

Explanation

A child have blood group O in the following two cases

The offsprings will have the above possibel blood groups .i.e, AB, A, B and O
Case II When father is `I^(B)` I and mother is `I^(A)` i.

The offsprings will have the above possible blood groups , i.i., AB, A B and O Thus a child can have blood group 'O' if parents have heaterozygous alleles for group 'A' and 'B'