Heritability

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In quantitative genetics, heritability is the amount of variance attributable to genetic sources.

Derived from the equation P = G + E (where P is variation in phenotype, G is variation in genotype and E is variation in environment), heritability, expressed as the value h2, can be stated mathematically as h2 = G / P = G / (G + E). P (and this G + E) always equals 1, so if genotype and environment contribute equally to the variation in phenotype, G and E both equal 0.5.

This page is part of the EvoWiki encyclopedia of genetics and molecular biology.

Topics: Genetics - Transmission genetics - Molecular genetics - Population genetics - Quantitative genetics - Molecular biology - Genomics
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