| Date | May 2012 | Marks available | 1 | Reference code | 12M.1.HL.TZ1.34 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | State | Question number | 34 | Adapted from | N/A |
Question
What causes variation in both sexually and asexually reproducing organisms?
A. Mutations
B. Polygenic inheritance
C. Crossing over
D. Independent assortment
Markscheme
A
Examiners report
Question 34 was based on assessment statements 2.5.6 and 5.4.6. More candidates than expected chose crossing over and independent assortment as the cause of variation in both sexual and asexual reproduction. Mutation was the expected answer.
