Multiple choice

If father has blood group A and mother has blood group O, then which one of the following blood groups may be found in their son?

  1. B

  2. AB

  3. O

  4. B, AB or O
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

If father has blood group A (genotype could be AA or AO) and mother has blood group O (genotype OO), their children can inherit either A or O alleles from the father and O from the mother. Possible genotypes are AO (blood group A) or OO (blood group O). Therefore, the son could have blood group O or A, but not B or AB.

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