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.

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

polymorphism

/poly·mor·phism/ (-mor´fizm) the quality of existing in several different forms.
balanced polymorphism  an equilibrium mixture of homozygotes and heterozygotes maintained by natural selection against both homozygotes.

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.

polymorphism

[pol′ēmôr′fizəm]
Etymology: Gk, polys + morphe, form
1 the state or quality of existing or occurring in several different forms.
2 the state or quality of appearing in different forms at different stages of development. Kinds of polymorphism are balanced polymorphism and genetic polymorphism. polymorphic, adj.

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.

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.

polymorphism

see a GENETIC POLYMORPHISM.

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.

polymorphism

the quality of existing in several different forms.

balanced polymorphism
an equilibrium mixture of homozygotes and heterozygotes maintained by natural selection against both homozygotes.
References in periodicals archive ?
Polymorphisms of the ADRBI gene between the patients and controls were evaluated by using Chi-square test, ANOVA, t-test, and correlation analysis.
Examinations of the GSTM1 and GSTT1 gene polymorphisms were performed using multiplex polymerase chain reaction (PCR), with the TLR2 gene as an internal control, as described by Hashemi et al.
Polymorphisms in the endothelial nitric oxide synthase gene have been associated inconsistently with cardiovascular diseases.
The role of endothelial nitric oxide synthase (eNOS) gene glu298asp polymorphism in postmenopausal coronary artery disease risk--a pilot study in north India.
Further work with this polymorphism and other CRP polymorphisms in larger diabetic populations are needed.
The C3b/C4b receptor (CR1, CD35) on erythrocytes: methods for study of the polymorphisms.
Polymorphisms in exon 13 and intron 14 of the RET protooncogene: genetic modifiers of medullary thyroid carcinoma?
Patients with polymorphisms at the 16 position had significantly lower pain scores throughout labor, compared with other patients, although they did not have significantly quicker active phases of labor.

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