noun, plural phenocopies. Genetics.
the observed result of an environmentally induced, nongenetic alteration of a phenotype to a form that resembles the expression of a known genetic mutation.

< German Phänokopie (1935); see phenotype, copy Unabridged
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World English Dictionary
phenocopy (ˈfiːnəʊˌkɒpɪ)
n , pl -copies
a noninheritable change in an organism that is caused by environmental influence during development but resembles the effects of a genetic mutation

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Medical Dictionary

phenocopy phe·no·cop·y (fē'nə-kŏp'ē)

  1. An environmentally induced, nonhereditary variation in an organism, closely resembling a genetically determined trait.

  2. An individual exhibiting such a variation.

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