| Date | November 2011 | Marks available | 1 | Reference code | 11N.1.SL.TZ0.15 |
| Level | Standard level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 15 | Adapted from | N/A |
Question
Which of the following statements relate(s) to Down syndrome (trisomy 21)?
I. It can be detected in chorionic villus samples.
II. It results from non-disjunction in meiosis.
III. It is caused by gene mutation.
A. I and II only
B. I and III only
C. II only
D. III only
Markscheme
A
Examiners report
N/A
