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Torus palatinus: a segregation analysis.

G Barbujani, M Rolo, I Barrai

    Human Heredity
    |January 1, 1986
    PubMed
    Summary
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    A torus palatinus is inherited in a simple dominant manner, as shown by segregation analysis in Venezuelan and Japanese populations. This genetic trait exhibits variable expressivity and high penetrance, with no sporadic cases detected.

    Area of Science:

    • Genetics
    • Human Anatomy
    • Population Studies

    Background:

    • Torus palatinus is a common benign bony growth.
    • Its genetic basis and inheritance patterns require further elucidation.

    Purpose of the Study:

    • To determine the inheritance pattern of torus palatinus.
    • To investigate the expressivity and penetrance of the torus palatinus gene.
    • To assess genetic heterogeneity across different populations.

    Main Methods:

    • Segregation analysis was performed on 99 sibships.
    • Data were collected from two distinct populations: Venezuela and Japan.

    Main Results:

    • Segregation analysis indicates a simple dominant inheritance pattern for torus palatinus.

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  • The gene responsible for torus palatinus demonstrates variable expressivity.
  • Penetrance was estimated to be approximately 85%, with no significant population heterogeneity observed.
  • No evidence of sporadic occurrences was found.

    • Conclusions:

    • Torus palatinus is inherited in a straightforward dominant genetic fashion.
    • The genetic mechanism is consistent across Venezuelan and Japanese populations.
    • The findings contribute to understanding the genetic architecture of common craniofacial traits.