| Date | May 2009 | Marks available | 1 | Reference code | 09M.1.HL.TZ2.31 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 31 | Adapted from | N/A |
Question
Male flies, heterozygous for both grey body and normal wings, were mated with black-bodied, vestigial-winged females. 2000 offspring were counted. The resulting percentage of each type of offspring is shown in the table below.
What conclusion can be drawn from the information given above?
A. The genes assort independently.
B. A mistake has been made.
C. The genes are linked.
D. The genes are on separate chromosomes.
Markscheme
C
Examiners report
N/A
