Multiple choice general knowledge

If father has blood group O and mother has blood group O, the Blood group of child can be

  1. A

  2. B

  3. AB

  4. O
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When both parents have blood group O (genotype OO), they can only pass O alleles to their children. Therefore, their children can only have blood group O. Types A, B, and AB are impossible since no parent has those alleles.

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