| Date | May 2016 | Marks available | 1 | Reference code | 16M.1.HL.TZ0.19 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Deduce | Question number | 19 | Adapted from | N/A |
Question
In which situation are alleles exchanged?
A. During the separation of sister chromatids
B. In the transmission of linked genes
C. During fertilization when sperm and egg chromosomes pair up
D. When chiasmata are formed between non-sister chromatids
Markscheme
D
Examiners report
These were all very good discriminators.
