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allele

noun [C]
 
 
/əˈliːl/ specialized

Definition

a gene that is found in one of two or more different forms in the same position in a chromosome, and so produces a particular characteristic that can be different for different people, such as eye colourGeneticsInnate and congenital
(Definition of allele noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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