Article

Behavior Genetics

, Volume 26, Issue 4, pp 407-408

First online:

Handedness in twins according to zygosity and chorion type: A preliminary report

  • Catherine DeromAffiliated withCentre for Human Genetics, Katholieke Universiteit Leuven
  • , Evert ThieryAffiliated withDepartment of Neuropsychology, University of Ghent
  • , Robert VlietinckAffiliated withCentre for Human Genetics, Katholieke Universiteit Leuven
  • , Ruth LoosAffiliated withCentre for Human Genetics, Katholieke Universiteit Leuven
  • , Robert DeromAffiliated withCentre for Human Genetics, Katholieke Universiteit Leuven

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Abstract

In the course of the East Flanders Prospective Twin Survey (EFPTS), handedness was assessed as part of a genealogical study (Meulemanset al., 1995) in 1616 twins (808 twin pairs) aged 6 to 28. Our findings are that, in this large population-based study with known placentation and zygosity, the often observed higher frequency of left-handedness in twins is confirmed, that it appears to be independent of zygosity and chorion type, and that the belief that discordant handedness in monozygotic twins represents mirrorimaging is mythical.

Key Words

Twins handedness zygosity chorion type heritability