| Date | May 2013 | Marks available | 1 | Reference code | 13M.1.SL.TZ1.17 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 17 | Adapted from | N/A |
Question
In guinea pigs black coat colour is dominant to white. In a test cross between a black and a white guinea pig both black and white offspring were produced. What percentage of the offspring would be expected to be white?
A. 75 %
B. 50 %
C. 33.3 %
D. 25 %
Markscheme
B
Examiners report
N/A
Syllabus sections
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