Occurrence of more than one morphotype within an interbreeding population of a single species; compare dimorphism.
Common variation or mutation in DNA, not always harmful.
in genetics, variability in a DNA sequence.
The existence within a population of two alleles of a gene, where the frequency of the rare allele is greater than 1%, and not attributable to recurrent mutation.
The presence of several forms of a trait, gene or DNA sequence in a population.
The occurrence of different forms, stages, or types in individual organisms or in organisms of the same species, independent of sexual variations.
In classical population genetics, polymorphism refers to the coexistance of different alleles in a population/species at significant frequencies (the most frequent allele should be less than 95%%). However, the term polymorphism is frequently used simply to indicate that genetic variation occurs within a certain part of the genome. In extreme, polymorphism can refer to just one nucleotide, e.g., SNP.
A gene that exists in more than one version (allele), and where the rare allele can be found in more than 2% of the population.
The occurrence of two or more variations of a phenotype or gene.
DNA sequence variation that occurs in at least 1% of the population.
The existence within a species or population of different forms of individuals, beyond those that are the result simply of recurrent mutation.
The existence of two or more genetically different classes in the same interbreeding population.
1. The occurrence of allelic variation at a locus. Polymorphism in nucleotide sequences has provided powerful diagnostic tools. See: DNA diagnostics, microsatellites, restriction fragment length polymorphism. 2. The occurrence of two or more forms in a population.
A polymorphism is a place in the human genome where a base can take on multiple forms. For example, a certain base may be A in one person and C in another. The length of some sections of DNA are also polymorphic. For example a particular segment may be 12 bases long in some people and 21 bases in others.
The presence in a population of two or more different forms of a gene, genetic marker, or inherited trait.
Scientific term for “gene variation.
the occurrence of two or more different types (morphs) within one species
( genetic polymorphism) The coexistence of two or more alleles at a locus.
Frequently occurring (common), usually normal variation, in a defined nucleotide sequence. Polymorphisms in genes may result in protein polymorphisms. A protein polymorphism is said to occur when the most common allele has a frequency of no greater than 99%.
A change in the sequence of DNA associated with a large portion of the population. Polymorphisms may or may not be linked to specific diseases.
naturally occurring variation in the sequence of a gene
(pol´ lee mor´ fiz um) [Gr. poly: many + morphe: form, shape] • (1) In genetics, the coexistence in the same population of two distinct hereditary types based on different alleles. (2) In social organisms such as colonial cnidarians and social insects, the coexistence of two or more functionally different castes within the same colony.
Difference in DNA sequence among individuals that occurs in 1% or more of a population.
The presence of more than one allele at a locus in a population; usually the word is used only when at least two alleles are fairly common.
A naturally occurring or induced variation in the sequence of genetic information on a segment of DNA.
(biology) the existence of two or more forms of individuals within the same animal species (independent of sex differences)
a change to the reference gene that does not cause disease or significantly alter gene function
an allelic variation in the genetic code of a particular gene sequence
a situation in which a characteristic possessed by individuals in the normal population varies
a trait (in this case a gene sequence) that is variable in a population
a trait which shows variability in a population (e
A natural variation in a gene, piece of DNA, protein, or chromosome that has no effect on the individual who inherits it.
a change in the DNA code that does not alter the functioning of a gene and therefore does not cause a disease. Some polymorphisms can confer some susceptibility or resistance to disease. close window
more than one distinct form within a species.
The simultaneous occurrence of two or more versions of a gene in a population.In mitochondrial DNA, it usually refers to different bases at a particular position, such as A750G.The frequency of the rarest form of the polymorphism is higher than can be maintained by recurrent mutation.
The existence, in a population, of two or more relatively common alleles at a genetic locus.
A frequently observed and statistically relevant occurrence of an alternate form of a nucleotide in a strand of DNA. A benign nucleotide change in the DNA strand (Ford, 1997).
Differences in DNA sequences that occur naturally in a population. Single nucleotide substitutions, insertions and deletions of nucleotides and repetitive sequences (microsatellites) are all examples of a polymorphism. The position at which such a sequence difference is found is a polymorphic site.
Where a number of variations occur, e.g. of a particular enzyme, or a number of different alleles at a locus.
in this context, the existence of inter-individual differences in DNA sequences coding for one specific gene. The effects of such differences may vary dramatically, ranging from no effect at all to the building of inactive proteins.
A common variation in the DNA sequence.
A highly variable chromosomal region where many different alleles of the same gene exist in different people within a population.
The occurrence of two or more states of a character in a single species.
A variation in DNA sequence within a population.
the normal, i.e., non-disease causing, variation of DNA
The occurrence of slightly different looking individuals within the same species; slight variations within one species.
Various forms of a gene exist at one particular locus.
The combination of multiple allelic forms and polygenic structure, causes a large number of different gene combinations to be formed. This gives rise to the variablilty of some proteins, such as the MHC.
A variation or mutation at a genetic location.
The presence of two or more alleles of a gene or other DNA sequence in a population. A variant allele that occurs in less than 1 percent of the population is considered a mutation.
Genetic characteristic with more than one common form in a population.
Variation in a region of DNA sequence among different individuals; the variation should be present in at least 1-2% of the population to be considered a polymorphism.
A genetic term. Polymorphisms are changes in the genetic code (like mutations) that occur commonly enough in the population such that they are considered a variation on normal. These may be harmful, helpful or neither to the persons who have a polymorphism.
Frequently occurring variation in a nucleotide sequence. Polymorphisms in genes result in protein polymorphisms. A polymorphism is said to occur when the most common allele has a frequency of no greater than 99 percent. Some forms of some polymorphisms are associated with increased risk of disease.
A trait of an organism that is found in more than one state in a population. Also used for the existence of different forms of a gene in a population. For example, one well known polymorphism of color vision is the existence of both red-green dichromats and normal trichromats in the human population.
Having multiple forms. Genetic polymorphism of an enzyme (such as P450) means that there are genetically based differences in forms of that receptor.
(lit. many forms) The existence of a gene in a population in at least two different forms at a frequency far higher than that attributable to recurrent mutation alone. Variations in a population may be measured by determining the rate of mutation in polymorphic genes (see SNPs).
One or more variations (alleles) of a gene that may express different phenotypes such as hair color and height.
Variations in DNA sequences in a population that are detected in human DNA identification testing.
A stretch of DNA located at the same relative location on a chromosome but differing in the amount or order of nucleotides.
Literally many shapes. Variations of chromosome appearance which are considered to be normal. These 'normal variants' are passed on within families without causing any problems in development.
1) The existence of more than one form or type in a species, beyond simple gender differences. Social insects such as honeybees with queens, drones, and workers demonstrate polymorphism. 2) Another term for pleomorphism, the occurrence of distinct forms during the life cycle of a plant or animal, such as the caterpillar and pupa that precede the adult.
Several forms occurring within the same species
Normal variation in genetic information. Used to describe minor variation in chromosome shape and normal or abnormal variation in molecular structure or content of genes.
A naturally occurring variation in the sequence of genetic information on a segment of DNA among individuals
A segment of DNA that has more than one form (allele), each of which occurs at a frequency of at least 1%. Polymorphisms are a natural part of genetic variation. A polymorphism in a gene may or may not affect its function.
Variable number of alleles for a test system. Systems that are highly polymorphic provide a greater power of exclusion
a common gene alteration seen in a certain percentage of the population, that may not be associated with disease.
Natural variations in a gene, DNA sequence, protein, or chromosome that have no adverse effect on the individual and occur with fairly high frequency in the general population Related Terms: allele ; allelic variant of unknown significance ; benign variant ; mutation ; restriction fragment length polymorphism
Where two or more alleles exist for a gene, such that at least two of the alleles are present in more than 1% of the chromosomes in a population.
An allele with a frequency in a population of at least 1 percent.
The occurrence of various alleles of a genetic marker in a population.
Difference in DNA sequence among individuals. Genetic variations occurring in more than 1% of a population would be considered useful polymorphisms for genetic linkage analysis. Compare mutation.
Variation. Presence of two or more different nucleotides at the same genetic position
Difference in DNA sequence among individuals of a given species due to the presence of two or more alleles of a given locus.
the simultaneous occurrence in the population of genomes showing allelic variations (e.g. as seen in alleles producing different phenotypes)
The occurrence in a population of two or more distinct forms of a genetically determined characteristic.
The property of a chemical substance crystallizing into two or more forms having different structures, such as diamond, graphite, and fullerenes from carbon. Also known as pleomorphism.
A difference in DNA sequence among individuals.
These sequence variations, or polymorphisms, make up many of the landmarks on modern genetic-linkage maps ... (IOCeleraGenome) Polimorfismo A seqüência contida no clone P3 não detectou nenhum polimorfismo enquanto que as seqüências... (POUniverRS)
A relatively common DNA sequence variation within a population at a given chromosomal location.
The occurrence of more than one form of, for example, a DNA sequence, type of protein or morphological trait in a group of organisms, revealing underlying genetic variation in the population.
having multiple forms of an allele at a locus within a population. Forensic scientists look for areas of DNA that are polymorphic because these allow people to be told apart from each other by their DNA.
The occurrence of many forms of the same species.
The property of having more than one state or alternate sequence at a particular position. The alternate states are called alleles.
Genetic variation. An enzyme that is expressed in some individuals but not others is said to be a polymorphic enzyme, as are enzymes that are encoded by the same gene locus but differ by one or more amino acids. These latter enzymes are also known as allelic variants or allelozymes.
A variant form of a gene. Most polymorphisms are harmless and are part of normal human genetic variation.
The occurrence in a population (or among populations) of several phenotypic forms associated with alleles of one gene or homologs of one chromosome.
A common (frequent) variation in the sequence of DNA among individuals.
Two or more kinds of physiological individuals maintained in a breeding population.
The occurrence of different crystalline forms of the same drug substance
The coexistence of several well-defined distinct phenotypes or alleles in a population.
Literally, "having many shapes"; in genetics polymorphism means occurring in more than one form within a species; the existence of multiple alleles at a particular genetic locus.
A variation in DNA sequence that does not disrupt genetic function or cause disease.
A variation in DNA sequence between individuals, which may cause no harm, or may make a gene faulty in the way it directs the production of a protein.
that which can assume several forms. In the case of DNA, these are sequences that are highly variable in different individuals.
A common variation among persons in the sequence of DNA; technically a locus is polymorphic when two or more of the alleles at this locus are present in 1% of the population.
The existence of distinctly different alleles in one population. Eg, different blood groups in humans.
The existence of more than one form of a genetic trait.
Individual differences in DNA. Single nucleotide polymorphism (the difference of one nucleotide in a DNA strand) is currently of interest to a number of companies.
the presence more than one distinct phenotypes in a population
The occurrence together of two or more distinctly different forms (morphs) of a species, the rarest form comprising more than 0.01% of the population and so being maintained by selection.
The appearance in a population of the same gene in multiple forms because of mutations.
In biology, polymorphism (from Greek: poly "many", morph "form") can be defined as discontinuous genetic variation that results in the occurrence of several different forms or types of individuals among the members of a single species. The most obvious example of polymorphism is the separation of most higher organisms into male and female sexes. Another classic example is the different melanic and non-melanic morphs of the peppered moth.