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polymorphism biology definition

polymorphism [pol″e-mor´fizm] the ability to exist in several different forms. Mutation and polymorphism are two types of DNA variants. 1. with regard to biology, the condition of possessing many physical or behavioral kinds within a species or populace. Polymorphism: Natural selection does not affect alleles that brings polymorphism. Mutation is an alteration of the nucleotide sequence of a gene. This generally occurs as a response to changes in temperature or pressure or both. An audio definition of SNPs is available from the National Human Genome Research Institute’s Talking Glossary of Genetic Terms.. How scientists locate SNPs in the genome is explained by the University of Utah Genetic Science Learning Center.. For people interested in more technical data, several databases of known SNPs are available: NCBI database of single nucleotide polymorphisms … n. 1. If a mutation occurs in a population with a frequency of more than 1%, the mutation is called a polymorphism. These moths are an excellent example of polymorphism in nature. A DNA polymorphism is a DNA sequence variation that is not associated with any observable phenotypic variation, and can exist anywhere in the genome, not necessarily in a gene. Psychology Definition of POLYMORPHISM: noun. Mineral - Mineral - Polymorphism: Polymorphism is the ability of a specific chemical composition to crystallize in more than one form. Polymorphism Differences between individuals in a population. Definition noun (1) The existence together of many forms of DNA sequences at a locus within the population. Conclusion. Take, for example, the birch moth - a night insect that teachers often use in the lessons of evolutionary biology and natural selection. Polymorphism occurs when there are several different physical forms or types of individuals in one form. In order to be classified as such, morphs must occupy the same habitat at the same time and belong to a panmictic population (one with random mating). (2) A discontinuous genetic variation that results in different forms or types of individuals among the members of a single species. Polymorphism [1] in biology occurs when two or more clearly different phenotypes exist in the same population of a species — in other words, the occurrence of more than one form or morph.In order to be classified as such, morphs must occupy the same habitat at the same time and belong to a panmictic population (one with random mating). Polymorphism, by strict definitions which hardly anybody pays attention to anymore, is a place in the DNA sequence where there is variation, and the less common variant is present in at least one percent of the people of who you test. Polymorphisms synonyms, Polymorphisms pronunciation, Polymorphisms translation, English dictionary definition of Polymorphisms. Polymorphism[1] in biology and zoology is the occurence of two or more clearly different morphs or forms, also referred to as alternative phenotypes, in the population of a species. 2. with regard to genetics, Polymorphism in biology occurs when two or more clearly different phenotypes exist in the same population of a species — in other words, the occurrence of more than one form or morph. Define Polymorphisms. Biology The occurrence of more than one form, as several alleles of a particular gene or winged and wingless forms of the same species. balanced polymorphism an equilibrium mixture of homozygotes and heterozygotes maintained by natural selection against both homozygotes. That is to distinguish, therefore, polymorphism from a rare variant that might occur in only one in 1,000 people. The different structures of such a chemical substance are called polymorphic forms, or polymorphs. 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