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  • Title: Effects of genetic and environmental factors on the a-b, b-c and c-d interdigital ridge counts.
    Author: Arrieta MI, Criado B, Hauspie R, Martinez B, Lobato N, Lostao CM.
    Journal: Hereditas; 1992; 117(2):189-94. PubMed ID: 1459858.
    Abstract:
    A study of 100 MZ (55 female and 45 male) and 97 DZ (50 male and 47 female) same-sexed twin pairs was carried out to analyse the genetic component of the variance of the a-b, b-c and c-d interdigital ridge counts by means of the Christian method. Especially for the a-b interdigital ridge count, we found it important to analyse both sexes separately. Our results suggest that the a-b count in males seems to be more influenced by environmental factors than the other counts. For females, the three interdigital counts seem to have a strong genetic component influencing their phenotypic expression. Factor analysis with VARIMAX rotation showed each interdigital ridge count to be genetically independent.
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