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An Allele-specific Gene Expression Assay to Test the Functional Basis of Genetic Associations
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Published on: November 3, 2010

Familial resemblance and heritability.

T K Rice1, I B Borecki

  • 1Division of Biostatistics, Washington University School of Medicine, St. Louis, Missouri 63110, USA.

Advances in Genetics
|October 19, 2000
PubMed
Summary
This summary is machine-generated.

Familial resemblance reflects shared genes and environments, with heritability quantifying additive familial effects. Advanced study designs and software help disentangle genetic and environmental influences on traits.

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Area of Science:

  • Quantitative genetics
  • Behavioral genetics
  • Genetic epidemiology

Background:

  • Familial resemblance indicates that relatives are more similar than unrelated individuals.
  • This resemblance is influenced by shared environments and biological relationships.
  • Heritability estimates the proportion of trait variance attributable to additive familial effects.

Purpose of the Study:

  • To explore the complexities of familial resemblance.
  • To differentiate between genetic heritability and generalized heritability.
  • To discuss methods for resolving sources of familial resemblance.

Main Methods:

  • Analysis of correlations and covariances within family members.
  • Utilizing extended pedigrees, twin, and adoption study designs.
  • Employing sophisticated software packages in genetic epidemiology.

Main Results:

  • Familial resemblance magnitudes reflect environmental sharing and genetic relatedness.
  • Generalized heritability includes additive genetic and familial environmental effects.
  • Study designs determine the resolvability of genetic, environmental, and interaction effects.

Conclusions:

  • Resolving familial resemblance requires careful consideration of genetic, environmental, and interaction effects.
  • Extended pedigrees and twin/adoption studies allow for better separation of etiological components.
  • Modern statistical methods and software aid in modeling complex familial resemblance patterns.