With reference to the percentages in Table 1, explain what can be concluded about the genetic basis of Anorexia Nervosa. Justify your answer.
| Biological Sibling | Non-identical Twin | Identical Twin |
|---|---|---|
| 12% | 14% | 55% |
6 exam-style questions on AQA A Level Psychology Biological explanations for anorexia nervosa. Each one has a worked solution and a mark scheme showing where the marks go.