| Date | May 2021 | Marks available | 1 | Reference code | 21M.1.HL.TZ1.35 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 35 | Adapted from | N/A |
Question
Which statement is valid regarding chromatids?
A. Sister chromatids separate during meiosis I.
B. Chiasmata form between non-sister chromatids.
C. Crossing over is the exchange of DNA between sister chromatids only.
D. Non-sister chromatids have the same combination of alleles.
Markscheme
B
Examiners report
[N/A]
