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English definition of “mutation”

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mutation

noun uk   /mjuːˈteɪ.ʃən/ us  
[U] the way in which genes change and produce permanent differences: It is well known that radiation can cause mutation. [C] a permanent change in an organism, or the changed organism itself: Environmental pressures encourage genes with certain mutations to persist and others to die out. These plants carry the mutation for red flowers.
(Definition of mutation from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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