Effects of genetic and environmental factors on the a-b, b-c and c-d interdigital ridge counts.
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.
Arrieta
M I
MI
Dpto Biología Animal y Genética, Facultad de Ciencias, Universidad del Pais Vasco, Bilbao, Spain.
Criado
B
B
Hauspie
R
R
Martinez
B
B
Lobato
N
N
Lostao
C M
CM
D003878:Dermatoglyphics; D004777:Environment; D005163:Factor Analysis, Statistical; D005260:Female; D014644:Genetic Variation; D006801:Humans; D008297:Male; D014429:Twins, Dizygotic / Q000235:genetics; D014430:Twins, Monozygotic / Q000235:genetics