The Genetic Explanation of Schizophrenia studies

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  • GENETICS
    • FAMILY STUDIES
      • Gottesman (1991)
        • Two Sz parents: 46% One Sz parent: 13% Sibling: 9%
      • Kendler (1985)
        • First degree relative of someone with Sz 18X more at risk
    • TWIN STUDIES
      • Gottesman (1991)
      • MZ twins 35-58% DZ twins 9-26%
      • Most severe form of Sz  Mz 75-91%
      • Milder forms of Sz MZ 17-33%
    • ADOPTION STUDIES
      • Tienari et al (2000)
      • Risk of developing Sz 4X greater in adopted with Sz biological mothers than bio mothers without

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