| Date | May 2022 | Marks available | 1 | Reference code | 22M.1.HL.TZ2.35 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 35 | Adapted from | N/A |
Question
When a cell divides by meiosis, chiasmata can be observed. Which are features of chiasmata?
I. They are points of attachment between chromatids of non-homologous chromosomes.
II. They occur during meiosis I.
III. They increase stability of bivalents.
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
Markscheme
C
Examiners report
This question discriminated well. Many weaker candidates failed to recognise that item I was incorrect as it referred to points of attachment between non-homologous (as opposed to homologous) chromosomes. This would have been sufficient to eliminate all the incorrect responses.
