单词	polymorphism
释义	polymorphism noun poly·​mor·​phism ˌpä-lē-ˈmȯr-ˌfi-zəm  : the quality or state of existing in or assuming different forms: such as a(1) : existence of a species in several forms independent of the variations of sex (2) : existence of a gene in several allelic forms also : a variation in a specific DNA sequence (3) : existence of a molecule (such as an enzyme) in several forms in a single species b : the property of crystallizing in two or more forms with distinct structure polymorphic ˌpä-lē-ˈmȯr-fik  adjective polymorphically ˌpä-lē-ˈmȯr-fi-k(ə-)lē  adverb Example Sentences Recent Examples on the Web Some people have a polymorphism that instructs their body to create two of the same enzyme instead of just one. C. Michael White, The Conversation, 4 Oct. 2021 The campaign uses a technique called polymorphism to blast out hundreds of thousands of unique samples. Dan Goodin, Ars Technica, 10 Dec. 2020 Some of us have a polymorphism, a genetic variant that slows our metabolism for caffeine. Dawn Mackeen, New York Times, 13 Feb. 2020 Genomic Prediction screens embryos for 1m single-nucleotide polymorphisms (SNPs)—tiny variations in individuals’ DNA that, added together, can raise or lower the likelihood of suffering a particular disease. The Economist, 8 Nov. 2019 Each variant has a version (more precisely, one of the alleles in a single nucleotide polymorphism) associated with a small boost to the trait in question. Charles Murray, WSJ, 27 Jan. 2020 Both examined more than 500,000 single nucleotide polymorphisms (SNPs)—swaps of one nucleotide for another at a particular spot in the DNA—from the Human Genome Diversity Panel. Gary Stix, Scientific American, 1 Nov. 2012 But then the Genetic Investigation of Anthropometric Traits Consortium—the GIANT consortium for short—identified more than 20,000 single-nucleotide polymorphisms (SNPs) that influence height in a series of groundbreaking studies. Ben Cohen, WSJ, 18 Sep. 2018 These sites are called single nucleotide polymorphisms — a.k.a. Brian Resnick, Vox, 27 Oct. 2018 See More Word History First Known Use 1839, in the meaning defined above Phrases Containing polymorphism restriction fragment length polymorphism restriction fragment length polymorphism Medical Definition polymorphism noun poly·​mor·​phism ˌpäl-i-ˈmȯr-ˌfiz-əm  : the quality or state of existing in or assuming different forms: as a(1) : existence of a species in several forms independent of the variations of sex (2) : existence of a gene in several allelic forms also : a variation in a specific sequence of DNA (3) : existence of a molecule (as an enzyme) in several forms in a single species b : the property of crystallizing in two or more forms with distinct structure
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