polymorphism

(redirected from balanced polymorphism)
Also found in: Thesaurus, Medical, Encyclopedia.

pol·y·mor·phism

 (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

(ˌpɒlɪˈmɔːfɪzəm)
n
1. (Biology) biology
a. the occurrence of more than one form of individual in a single species within an interbreeding population
b. the occurrence of more than one form in the individual polyps of a coelenterate colony
2. (Chemistry) the existence or formation of different types of crystal of the same chemical compound

pol•y•mor•phism

(ˌpɒl iˈmɔr fɪz əm)

n.
1. the state or condition of being polymorphous.
2.
a. genetic variation that produces differing characteristics in individuals of the same population or species.
b. the occurrence of different castes or types within the same sex, as in social ants.
3. crystallization into two or more chemically identical but crystallographically distinct forms.
[1830–40]
pol`y•mor′phic, adj.

pol·y·mor·phism

(pŏl′ē-môr′fĭz′əm)
1. The existence of two or more different forms in an adult organism of the same species, as of an insect. In bees, the presence of queen, worker, and drone is an example of polymorphism. Differences between the sexes and between breeds of domesticated animals are not considered examples of polymorphism.
2. The crystallization of a compound in at least two distinct forms. Diamond and graphite, for example, are polymorphs of the element carbon. They both consist entirely of carbon but have different crystal structures and different physical properties.

polymorphism

the occurrence of several forms or colors in one species of insect. — polymorphous, adj.
See also: Insects
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.polymorphism - (genetics) the genetic variation within a population that natural selection can operate on
genetic science, genetics - the branch of biology that studies heredity and variation in organisms
organic phenomenon - (biology) a natural phenomenon involving living plants and animals
single nucleotide polymorphism, SNP - (genetics) genetic variation in a DNA sequence that occurs when a single nucleotide in a genome is altered; SNPs are usually considered to be point mutations that have been evolutionarily successful enough to recur in a significant proportion of the population of a species
2.polymorphism - (chemistry) the existence of different kinds of crystal of the same chemical compound
chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
chemical phenomenon - any natural phenomenon involving chemistry (as changes to atoms or molecules)
dimorphism - (chemistry) the property of certain substances that enables them to exist in two distinct crystalline forms
3.polymorphism - (biology) the existence of two or more forms of individuals within the same animal species (independent of sex differences)
biological science, biology - the science that studies living organisms
organic phenomenon - (biology) a natural phenomenon involving living plants and animals
dimorphism - (biology) the existence of two forms of individual within the same animal species (independent of sex differences)

polymorphism

noun
Biology. The quality of being made of many different elements, forms, kinds, or individuals:
Translations
mnohotvarost
polimorfizamvišeobličje
同質異像多形多形性多態
polymorfisme

polymorphism

[ˌpɒlɪˈmɔːfɪzəm] Npolimorfismo m

polymorphism

References in periodicals archive ?
Balanced polymorphism selected by genetic versus infectious human disease.
The oldest and best known example of balanced polymorphism shared between humans and chimpanzees is the major histocompatibility complex (MHC), a group of genes that help the immune system distinguish between the body and potential invaders, such as bacteria or viruses.
Racial variability in the UDP-glucuronosyltransferase 1 (UGT1A1) promoter: a balanced polymorphism for regulation of bilirubin metabolism?
Balanced polymorphism is potentially valuable for the insight it provides into therapeutic approaches.
One indication of a balanced polymorphism is a higher rate of nonsynonymous than synonymous substitution (8).
We use our intelligence to disentangle the good-evil mix of a balanced polymorphism of this sort.
This is being examined in the light of the hypothesis of a genetic balanced polymorphism for laterality and ability (Annett, 1985).
Balanced polymorphism at these loci is maintained by selection, which is frequency dependent due to population regulation operating independently within each habitat (soft selection, Christiansen 1975).

Full browser ?