O-LevelBiologyGenetics & Variation5090/11 · Oct/Nov 2019 · Q391 Mark
A father has blood group AB and the mother has blood group O. What is the predicted ratio of blood groups for the offspring?
A1:1 A:B
B1:1 AB:O
C1:1:1 A:B:O
D1:1:1:1 A:B:AB:O
✓ Correct answer
A: 1:1 A:B
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