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 ?
Conclusion: In Pakistani women the association of TP53 gene codon 72 arginine/proline polymorphism was present.
It has suggested that CAT-21A/T (rs7943316) OMIM: 115500 gene promoter polymorphism is predominantly associated with different human disorders such as hypertension, cancers, diabetes, nephropathy, and other diseases accompanied by oxidative stress.
The most frequently studied polymorphisms in VDR gene are BsmI, ApaI, and TaqI, at the 3' end of the VDR gene and thymine/cytosine polymorphism (Fok-I) located at the first potential start site.
We included those studies that provided genotype and allelic data for polymorphisms of Arg16Gly and Glu27Gln of subjects with nocturnal asthma.
Association of polymorphisms of A260G and A386G in DAZL gene with male infertility: A meta-analysis and systemic review.
The aim of this study was to examine the role of three Single Nucleotide Polymorphisms (SNPs) in the ESR2 gene, including + 1082G/A (a silent transition in exon 5),+1730G/A (3'untranslated region of the exon 8) and one intron (rs1256030 C/T in intron2) in URSA among Iranian population.
11 Several polymorphisms have been identified in VDR gene that has functional significance.
Only few studies have been conducted to study the polymorphisms present in SOD1 gene in association with RA.
The rare p53 polymorphism analyzed in this study is found almost exclusively in populations of African descent.
Functional polymorphisms of the human multidrug resistance gene: multiple sequence variations and correlation of one allele with P-glycoprotein expression and activity in vivo.
These polymorphisms have been studied in several populations, and it show discrepancies regarding their influence on stroke onset, it depends on the ethnic group and patient origin.
The analysis of Ile462Val (A/G) and Asp449Asp (T/C) polymorphisms of CYP1A1 gene was performed by the polymerase chain reaction (PCR)-restriction fragment length polymorphism method.

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