Handedness in twins according to zygosity and chorion type: A preliminary report
- Cite this article as:
- Derom, C., Thiery, E., Vlietinck, R. et al. Behav Genet (1996) 26: 407. doi:10.1007/BF02359484
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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.