Question 21M.2.HL.TZ2.2b.ii
| Date | May 2021 | Marks available | [Maximum mark: 1] | Reference code | 21M.2.HL.TZ2.2b.ii |
| Level | HL | Paper | 2 | Time zone | TZ2 |
| Command term | Label | Question number | b.ii | Adapted from | N/A |
Using the letter M, label the stage on the diagram where sister chromatids migrate to opposite poles.
[1]
anaphase ✔
The stage should be clearly labelled.
If more than one stage is shown the candidate does not receive a mark.
There were several G2 comments about Q2a, as it could be said that several processes were occurring. Perhaps it should have been more specific. Two out of DNA replication, cell growth and duplication of organelles were expected for the two marks. A surprising number of candidates in all languages, confused 'processes' with 'phases' and stated that interphase consisted of G1, S and G2. Most managed to label prophase and anaphase correctly on the diagram as required in part (b). The answers to part (b) were generally clear, but some lost marks for not comparing the same point. For example 'Mitosis produces diploid cells, but meiosis produces gametes' did not score a mark. The mitotic index was well known.
