Digital Dermatoglyphic Heritability Differences as Evidenced by a Female Twin Study

Digital Dermatoglyphic Heritability Differences as Evidenced by a Female Twin Study

The genetic and environmental contributions to determine digital dermatoglyphic traits were investigated by using female dizygotic and monozygotic twin pairs to estimate heritability indexes (h2). The evaluated sample was composed by 20 monozygotic twin pairs and 13 dizygotic twin pairs. A significa...

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Published in:Twin research and human genetics Vol. 13; no. 5; pp. 482 - 489
Main Authors: Machado, João Felipe, Fernandes, Paula Roquetti, Roquetti, Ricardo Wagner, Filho, José Fernandes
Format: Journal Article
Language:English
Published: Cambridge, UK Cambridge University Press 01-10-2010
Subjects:
Adolescent
Adult
Brazil
Child
Chorion
Dermatoglyphics
Diseases in twins
Female
Finger
Gene expression
Genetic Association Studies
Genetic Variation
Genotype-environment interaction
Hand
Heredity, Human
Heritability
Human genetics
Humans
Monozygotic twin (MZ)
pattern frequency
twin method
Twin studies
Twins
Twins, Dizygotic - genetics
Twins, Monozygotic - genetics
Young Adult
Brazil
dermatoglyphics
pattern frequency
twin method
heritability
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Summary:The genetic and environmental contributions to determine digital dermatoglyphic traits were investigated by using female dizygotic and monozygotic twin pairs to estimate heritability indexes (h2). The evaluated sample was composed by 20 monozygotic twin pairs and 13 dizygotic twin pairs. A significant heritability (h2 = 0.65 to 0.96) was observed for 12 dermatoglyphic characteristics (delta indexes and ridge counts for right hand, left hand and both hands, and ridge counts for most individual fingers). A negative correlation between the ridge counts and heritability indexes from individual fingers was found for the left hand, which appears to be associated to a higher arch pattern frequency in most left-hand fingers, since this frequency was negatively correlated with ridge counts and positively correlated with heritability indexes. Heritability indexes of right-hand fingers were positively correlated with loop pattern frequency and negatively correlated with whorl pattern frequency. The low heritability of ridge counts from left thumb, ring and little fingers (h2 = 0.11 to 0.32) indicates a higher chance that the chorion type had an influence in the intra-pair variance of monozygotic twins. Results confirmed the predominant genetic influence on the total ridge count. The heritability indexes varied in up to 8 times between different fingers and its association to ridge counts and pattern frequency was very variable between hands, evidencing that the use of dermatoglyphic traits from individual fingers as indicators of genetic influences to other human traits should consider this variability.
Bibliography:PII:S1832427400010914
ArticleID:01091
ark:/67375/6GQ-VD0JDHB7-6
Address for correspondence: João Felipe Machado, Universidade Federal do Rio de Janeiro, Laboratório de Biociências do Movimento Humano — LABIMH, Escola de Educação Física e Desporto, Avenida Carlos Chagas Filho, 540, Cidade Universitária, CEP 21941-599, Rio de Janeiro, RJ, Brazil.
istex:D343A8561BEEF5ABFEED8F143C5341A41DE3417C
Twin Research and Human Genetics, Vol. 13, No. 5, Oct 2010: 482-489
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ISSN:1832-4274
1839-2628
DOI:10.1375/twin.13.5.482