Twin studies

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studyskills_

Cards (5)

  • The twins study looked into the ‘criminal gene’ and the fact that if one twin possessed this gene then the other one should as well.
    Early studies show a higher degree of correlation between monozygotic twins (identical twins) rather than dizygotic twins (fraternal twins).
  • Monozygotic twins (MZ) - Identical Twins
  • Dizygotic twins (DZ) - fraternal twins
  • Christiansens study (1977)
    • 3586 twin pairs were studied in denmark
    • 52% concordance rate with the identical (MZ) twins
    • 22% concordance rate with the fraternal (DZ) twins.
  • The twin studies were in fact a flawed study due to the small sample size and the poor methods which included no proper DNA testing on the twins meaning there was no way of being 100% certain weather or not twins were identical or not.