O-LevelBiologyGenetics & Variation5090/12 · Oct/Nov 2023 · Q341 Mark
Which statements are correct? 1 Each chromosome contains one molecule of DNA. 2 A gene is a section of DNA on a chromosome. 3 A gene contains smaller regions called alleles.
A1, 2 and 3
B1 and 2 only
C1 and 3 only
D2 and 3 only
✓ Correct answer
B: 1 and 2 only
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