With the aim of determining sexual dimorphism in the component structures among the Chuvashian population of
Russia, finger and palmar dermatoglyphics of 547 individuals (293 males, 254 females) were analyzed. The sex differences
in two categories of dermatoglyphic traits (22 quantitative traits and 38 asymmetry and diversity traits) are reflected
differently and contradictory with other ethnic groups. However, a common feature of the factor 1 »digital pattern size
factor« (finger ridge counts from the first category of traits) indicate its degree of universality when compared with other
populations, which suggests that the variability of finger ridge counts is determined by the same genes that control the
pattern types. The factors »intra-individual finger diversity factor«, and »bi-lateral asymmetry factor« extracted from the
second category of dermatoglyphic traits are also similar in both sexes. However, these components are hardly described
in the literature. The nature of variation of these components (from two categories of dermatoglyphic traits) appears with
a good similarity between sexes, which suggests their common biological validity of the underlying component structures
of the finger and palmar dermatoglyphic characters
