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WordReference Random House Unabridged Dictionary of American English © 2024al•lele (ə lēl′),USA pronunciation n. [Genetics.]- Geneticsany of several forms of a gene, usually arising through mutation, that are responsible for hereditary variation.
- Greek allēlo-, combining form of allé̄lōn of/to one another, reciprocally
- German Allel, apparently as shortening of German equivalents of allelomorph or allelomorphic gene; allelo-
- 1930–35;
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