Concept
Allele
Allele
One of the alternative DNA sequence forms found at a particular genetic locus.
Overview
EXPLORE BY LEVELAn One DNA-sequence version at a particular locus. An allele can affect a trait, but a sequence difference is not automatically harmful. is one version of a gene or DNA region. Different DNA-sequence versions at a particular locus. Their effects depend on molecular function and biological context. can sometimes affect a trait, but not every DNA difference changes a visible trait.
Quick Facts
AT A GLANCETopicHeredity & Cell Division
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Recommended Reading
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Research Claims
Allele is a locus-relative term; sequence variation can range from single substitutions to structural variation, and its functional or clinical interpretation requires evidence.