Marcus and Julian are identical twins who were adopted by different families shortly after birth. When they reunited at the age of 40, they discovered they had very different temperaments. Marcus is highly anxious and prone to stress, whereas Julian is remarkably calm and resilient under pressure.
Use your knowledge of genotype and phenotype to explain this difference in their temperaments.
Practise AQA A Level Psychology Biological approach with exam-style questions for A Level Psychology. 48 questions, 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.
