Epigenetics and twins: three variations on the theme.

Abstract excerpt

Twin studies have had a key role in the evaluation of heritability, a population-based estimate of the genetic contribution to phenotypic variation. These studies have led to the revelation that most normal and disease phenotypes are to some extent heritable. Recently, interest has shifted from phenomenological heritability to the identification of trait-specific genes. The era of twin studies, however, is not...

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