| Date | May 2013 | Marks available | 1 | Reference code | 13M.1.HL.TZ1.33 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 33 | Adapted from | N/A |
Question
In fruit flies (Drosophila melanogaster) grey body is dominant to black body and long wings are dominant to vestigial wings. Two flies heterozygous for both genes were crossed. What proportion of the offspring would be expected to have black bodies and long wings?
A. 1/2
B. 3/16
C. 1/4
D. 1/16
Markscheme
B
Examiners report
N/A
