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Topologically significant dermatoglyphic patterns in twins.

D Loesch, Z Swiatkowska

    Acta Geneticae Medicae Et Gemellologiae
    |January 1, 1977
    PubMed
    Summary
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    Dermatoglyphic traits, including fingertip, palm, and sole patterns, show varying heritability. Sole patterns exhibit higher heritability than palmar patterns, highlighting genetic influences on these unique human characteristics.

    Area of Science:

    • Human genetics
    • Dermatoglyphics
    • Twin studies

    Background:

    • Dermatoglyphic patterns (loops, triradii) on palms, soles, and fingertips are unique human identifiers.
    • Twin studies are crucial for estimating the heritability of complex traits.

    Purpose of the Study:

    • To investigate the heritability of 58 dermatoglyphic characters using monozygotic (MZ) and dizygotic (DZ) twin pairs.
    • To compare heritability estimates between palmar and sole dermatoglyphic patterns.

    Main Methods:

    • Analysis of 58 dermatoglyphic characters in 110 MZ and 111 like-sexed DZ twin pairs.
    • Calculation of concordance rates, heritability coefficients (h2, Hr), and intraclass correlation coefficients.
    • Comparison of heritability estimates derived from twin data with family correlation data.

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    Main Results:

    • Significant differences in heritability were observed between palmar and sole patterns.
    • Sole loops and triradii demonstrated the highest heritability estimates.
    • Most palmar loops exhibited the lowest heritability estimates.

    Conclusions:

    • Heritability estimates for dermatoglyphic traits vary considerably between body regions.
    • Sole patterns appear to be more genetically influenced than palmar patterns.
    • Potential biases in twin studies, such as character symmetry, require careful consideration during heritability interpretation.