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In genetics, an allele is one of a number of different versions of the same gene, occupying the same locus, which result in a different phenotype.

In diploid organisms, there can be a different allele occupying the same locus of each chromosome of a chromosome pair (a heterozygous genotype), or the same allele occuring at both loci on a chromosome pair (a homozygous genotype).


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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