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Discuss biological theories of schizophrenia. (24 marks)
The basic idea of the genetic theory is that schizophrenia (Sz) can be inherited and run through families. This
is tested through family, twin and adoptive studies. Zimbardo and Gottesman suggested the general
population have a 1% risk of getting Sz. Monozygotic (MZ)…

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therefore showing that increased dopamine levels leads to schizophrenia symptoms. The issue with this is
that it is very hard to diagnose schizophrenia in rats; in humans it is usually diagnosed by talking to patients
about their symptoms but this is impossible with animals so the results may suffer from…


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