Dermatoglyphics of Twins: A Study based on a new Systematics

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Abstract
Summary: 1. The Author has investigated on a twin material of 34 twin pairs the papillary line patterns on the fingers, the interdigital areas of the palms, and the hallucal area of the soles according to a systematics accounted for by the Author in earlier works.2. The diagnosis of zygosity has been based on a comparison for the morphological particularities and on blood group analyses, in the cases in which the relative chance for dizygosity for the concordant pairs has been calculated.3. The frequency distribution for the papillary line patterns of the twin pairs showed no significant divergence with respect to the large Swedish population, earlier investigated.4. The 19 MZ twin pairs showed a concordance of 84.2-89.5% for the total qualitative value, total ridge-count and for the hallucal patterns.

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