What is a monozygotic twin?
Where the egg cell splits- shares one placenta
What is a dizygotic twin?
Two egg cells, separate placentas
Summarise the diathesis stress explanation
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Diathesis definition
The suggestion that individuals have vulnerabilities to addiction
Stressor definition
The stressful situation the person experiences that will interact with the diathesis
Diathesis stress definition
The interaction between the diathesis and the stressor