| Date | May 2011 | Marks available | 1 | Reference code | 11M.1.HL.TZ1.13 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 13 | Adapted from | N/A |
Question
A new allele that provides herbicide resistance is identified in soybean plants. The allele is dominant. Which of the following would be carried out in a herbicide-resistant plant to find out if it is homozygous or heterozygous for the gene?
A. Gel electrophoresis
B. Karyotyping
C. Test cross
D. DNA profiling
Markscheme
C
Examiners report
This question proved very easy for the candidates. There were some questions from teachers on G2s as to whether gel electrophoresis and DNA profiling would also be correct molecular techniques to distinguish plants homozygous or heterozygous for the trait in question.
Syllabus sections
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