O-LevelBiologyGenetics & Variation5090/12 · May/June 2021 · Q371 Mark

Which sex chromosomes are present in every sperm cell?

AX chromosome only

BY chromosome only

CX or Y chromosome only

DX and Y chromosomes

✓ Correct answer

C: X or Y chromosome only

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Topic: Genetics & Variation, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2021 Paper 1 Variant 2, question 37.

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