A recent psychiatric study indicates that Major Depressive Disorder (MDD) has a significant hereditary component.
Sarah's mother suffered from severe MDD. Sarah is considering undergoing genetic screening to see if she will develop MDD in the future.
Explain why Sarah’s genotype will not reveal for certain whether she will suffer from Major Depressive Disorder.
Practise AQA A Level Psychology Approaches in Psychology with exam-style questions for A Level Psychology. 248 questions covering Learning approaches, Cognitive approach, Biological approach, Psychodynamic approach (A-level only), Humanistic Psychology (A-level only), and Comparison of approaches (A-level only), matched to the AQA A Level Psychology (7182) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.