polymorphism

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Related to Polymorphisms: Genetic polymorphism

polymorphism

 [pol″e-mor´fizm]
the ability to exist in several different forms.
balanced polymorphism an equilibrium mixture of homozygotes and heterozygotes maintained by natural selection against both homozygotes.
genetic polymorphism the occurrence together in the same population of two or more genetically determined phenotypes in such proportions that the rarest of them cannot be maintained merely by recurrent mutation.
single nucleotide polymorphism (SNP) a genetic polymorphism between two genomes that is based on deletion, insertion, or exchange of a single nucleotide.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

pol·y·mor·phism

(pol'ē-mōr'fizm),
Occurrence in more than one form; existence in the same species or other natural group of more than one morphologic type.
Synonym(s): pleomorphism
Farlex Partner Medical Dictionary © Farlex 2012

polymorphism

(pŏl′ē-môr′fĭz′əm)
n.
1. Biology The occurrence of more than one form, as several alleles of a particular gene or winged and wingless forms of the same species.
2. Chemistry Crystallization of a compound in at least two distinct forms. Also called pleomorphism.

pol′y·mor′phic, pol′y·mor′phous adj.
pol′y·mor′phous·ly adv.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

pol·y·mor·phism

(pol'ē-mōr'fizm)
Occurrence in more than one form; existence in the same species or other natural group of more than one morphologic type.
Synonym(s): pleomorphism.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

polymorphism

1. Occurring in many different shapes.
2. In genetics, the existence of different ALLELES of the same gene in different genomes. See also RESTRICTION FRAGMENT LENGTH POLYMORPHISM.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

polymorphism

see a GENETIC POLYMORPHISM.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

pol·y·mor·phism

(pol'ē-mōr'fizm)
Occurrence in more than one form; existence in same species or other natural group of more than one morphologic type.
Synonym(s): pleomorphism.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Association of TNF-a -308 G>A and ACE I/D Gene Polymorphisms In Hemodialysis Patients With Arteriovenous Fistula Thrombosis.
Genetic association studies have been conducted to evaluate the association between genetic polymorphisms and different AP phenotypes, and thus determine whether genetic polymorphisms are associated with AP.
p27 mainly include two polymorphisms [45], called rs2066827 (109T/G) and rs34330 (-79 C/T).
Three single-nucleotide polymorphisms (SNPs) were selected according to the National Center for Biotechnology Information SNP database.
Association studies using novel polymorphisms in BACE1 and BACE2.
Polymorphisms of the ovine leptin gene and its association with growth and carcass traits in three Iranian sheep breeds.
Then, polymorphisms were determined for both groups using Real Time-PCR and allele groups were analyzed.
In the present study we evaluated polymorphisms in the LAMA1 (rs2089760) and TGFB1 (rs4803455) genes in children younger than 13 years of age with <6 D myopia in an attempt to further elucidate the genetic basis of high myopia.
The overall sequence variation across the bovine CYP11B1 locus is high and thirteen novel polymorphisms were identified (Table I).
This study has investigated five single nucleotide polymorphisms in TNF-[alpha] gene's promoter region to evaluate their relationship with recurrent pregnancy loss disorder.
(9.) Zhou XJ, Cui Y, Cai LY, Xiang JY, Zhang Y Toll-like receptor 4 polymorphisms to determine acute pancreatitis susceptibility and severity: a meta-analysis.
The DNA samples were subjected to allele-specific matrix-assisted laser desorption/ionization-time-of-flight (MALDI-TOF) mass spectrometry and MassARRAY (Sequenom, San Diego, CA, USA) analyses for the XRCC1 G28152A, MUTYH G972C, HOGG1 C1245G , and PARP1 T2444C gene polymorphisms. Primers and multiplex reactions were designed using RealSNP.com.

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