O-LevelBiologyGenetics & Variation5090/11 · May/June 2014 · Q381 Mark

The diagram shows the blood group phenotypes of some members of a family. [Figure 38.1] Which member of the F1 generation must be heterozygous, with the codominant alleles?

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AMember A of the F1 generation

BMember B of the F1 generation

CMember C of the F1 generation

DMember D of the F1 generation

✓ Correct answer

B: Member B of the F1 generation

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Topic: Genetics & Variation, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2014 Paper 1 Variant 1, question 38.

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