| Date | May 2010 | Marks available | 1 | Reference code | 10M.1.SL.TZ1.17 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Identify | Question number | 17 | Adapted from | N/A |
Question
What type of inheritance is shown in this pedigree chart?
A. X-linked dominant
B. Y-linked dominant
C. X-linked recessive
D. Y-linked recessive
Markscheme
C
Examiners report
Although one teacher complained about the use of a non-standard carrier notation, this question was in general well answered by the most capable candidates.
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