With reference to relevant research studies, to what extent does genetic inheritance influence behaviour?

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  • With reference to relevant research studies, to what extent does genetic inheritance influence behaviour?
    • 1. Introduction
      • To an extent...
      • Briefly outline what genetic inheritance is
      • Link to BLoA?
    • 2. Intelligence is 70% genetic
      • Bouchard and McGue (1981)
        • Meta-analysis
        • Reviewed 111 studies on IQ correlations in siblings
        • Found that closer the kinship-higher the correlation
      • Minnesota Twin Study
        • Bouchard et al (1990)
        • Comparison between MZAs (Identical twins raised together) and MZTs (Identical twins raised apart)
        • Cross Cultural
        • Conducted over 11 years
        • Each twin completed 50 hrs of testing
    • 3. Behaviour
      • Adoption Studies
        • Allows direct comparison of genetic and environmental influences on behaviour
        • Correlation exhibited between behaviour and genetics
    • 4. However, there are arguments against this for example...
    • 5. Intelligence
      • Scarr and Weinberg (1977)
      • Birth and adoptive children raised together
      • Results showed no sig difference in IQ
    • 6.Behaviour
      • Abnormal behaviour
        • Depression
        • Diathesis-stress model
        • Only 'genetic vunerabilty'
        • no single cause-and-effect relationship between genes and behaviour
    • 7. Conclusion
      • There is still ambiguity as to whether genetics have a direct effect on behaviour

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