Biology 9700 · 16 Inheritance
16.2 The roles of genes in determining the phenotype
Use genetic diagrams to predict inheritance patterns, apply chi-squared tests, and explain how specific genes determine phenotypic traits.
- Questions
- 108
- Years
- 2002–2026
- Multiple choice
- 5
- Written answer
- 103
- Average marks
- 10.3
Where this subtopic appears
- Paper 4variants 04, 41, 42, 43, 4491
- Paper 5variants 51, 52, 537
- Paper 1variants 11, 12, 135
- Paper 6variants 065
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | 1 | 4 | – | 5 |
| 2023 | – | 3 | 3 | 6 |
| 2022 | 1 | 3 | 1 | 5 |
| 2021 | – | 6 | 3 | 9 |
| 2020 | 2 | 4 | 6 | 12 |
| 2019 | 1 | 3 | 8 | 12 |
| 2018 | 2 | 3 | 4 | 9 |
| 2017 | 2 | 4 | 4 | 10 |
| 2016 | 1 | 5 | 3 | 9 |
| 2015 | – | 3 | 5 | 8 |
| 2011 | – | 1 | – | 1 |
| 2010 | – | 4 | 2 | 6 |
| 2009 | – | 1 | 1 | 2 |
| 2008 | – | 1 | 1 | 2 |
| 2007 | – | 1 | 1 | 2 |
| 2006 | – | 1 | 2 | 3 |
| 2005 | – | – | 1 | 1 |
| 2004 | – | 1 | – | 1 |
| 2003 | – | 2 | – | 2 |
| 2002 | – | 2 | 1 | 3 |
