Monozygotic Twins Reared Apart

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The article ‘Sources of Human Psychological Differences: The Minnesota study of Twins Reared Apart’ includes the studies of Bouchard, Lykken, McGue, Segal and Tellegen which reveals psychological differences between monozygotic twins who were nourished separately and together. This study is derived from the Minnesota study which has conducted research over monozygotic and dizygotic twins from around the world since 1979 (Bouchard, Lykken, McGue, Segal, Tellegen, 1990). The monozygotic twins are defined as twins developed from single egg and two embryos. The studies of different researchers included in this article are summarized below.
The researchers have tried to illustrate the effects of genetic make-up and family environment over personality,

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