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: any of the alternative forms of a gene that may occur at a given locus (see locus sense 3)
: either of a pair of alternative Mendelian characters (see character entry 1 sense 1b(3)) (such as smooth and wrinkled seed in the pea)
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1921, in the meaning defined at sense 1
German Allel, short for Allelomorph
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More Definitions for allele
: any of the alternative forms of a gene that may occur at a given locus
: either of a pair of alternative Mendelian characters (as ability versus inability to taste the chemical phenylthiocarbamide)
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Britannica.com: Encyclopedia article about allele
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