A polymorphism is a genetic variant that appears in at least 1% of a population.
more than two types of castes of individuals in a colony or community that belong in the same species and are derived from the same parents. The various castes of honeybees, ants, termites, and so forth are typical ...
Differences between individuals in a population.
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The occurrence in a population (or among populations) of several phenotypic forms associated with alleles of one gene or homologs of one chromosome. See genetic .
Polymorphism involves one of two or more variants of a particular DNA sequence. The most common type of polymorphism involves variation at a single base pair.
in the immune system
Immune system genes are exceptionally polymorphic, reflecting in part selection by diverse and rapidly varying pathogens, ...
Genetic polymorphisms are genetic variations in genes, e.g., single nucleotide polymorphisms (SNP).
This category has only the following subcategory.
TAG: Restriction fragment length
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Polymorphism: a term to show that mutations do occur in the Y chromosome, as can happen with other chromosomes. It is a naturally occurring or induced variation in the sequence of genetic information on a segment of DNA.
/PAWL-ee-MORE-fiz-É™m/ n. The existence of two or more distinct genetic variants within a population; usually refers to variation at a particular locus.
Polymorphisms. Variant forms of a particular gene that occur simultaneously in a population.
Polynucleotide. A DNA polymer composed of multiple nucleotides. (See Nucleotide.) ...
occurrence of several distinct forms of a species in the same habitat at the same time
(poly = many; morpho = form)
Polypeptide a chain of amino acids bonded together
(poly = many; pepti = digested‚ cooked) ...
Difference in DNA sequence among individuals that may underlie differences in health. Genetic variations occurring in more than 1% of a population would be considered useful polymorphisms for genetic linkage analysis.
Most of our DNA is identical to DNA of others. However, there are inherited regions of our DNA that can vary from person to person. Variations in DNA sequence between individuals are termed "s".
Indel polymorphism: Insertion/deletion polymorphism. See Description of Sequence Changes for indel polymorphisms.
The existence of two or more genetically different classes within a population.
Genetic polymorphism: Presence of several genetically controlled variants in a population.
Difference in DNA sequence among individuals. Applied to many situations ranging from genetic traits or disorders in a population to the variation in the sequence of DNA or proteins.
- The presence of several forms of a trait or a gene in a population
((biology) the existence of two or more forms of individuals within the same animal species (independent of sex differences)) ...
polymorphism The presence in a species of more than one structural type of individual.
polynomial A scientific name for an organism composed of more than two words.
polynucleotide A nucleotide of many mononucleotides combined.
A , the existence of two or more forms of sequence between different individuals of the same species, can arise from a change in a single nucleotide.
A polymorphism also refers to any biologic marker (DNA, RNA or protein) with two or more states.
Count George-Louis Leclerc de Buffon said that species: ...
Sequence polymorphism differing in a single base pair.
Example for a single nucleotide substitution: ...
A type of in which the frequencies of the coexisting forms do not change noticeably over many generations.
Balanced polymorphism: The maintenance of two or more alleles in a population due to a selective advantage of the heterozygote.
A Difference in DNA sequence among individuals. Genetic variations occurring in more than 1% of a population would be considered useful s for genetic linkage analysis. Compare mutation.
(See DNA polymorphism.) Alternative mRNA splicing. The inclusion or exclusion of different exons to form different mRNA transcripts. (See RNA.) Amino acid.
Balanced An equilibrium of two or more alleles that has remained constant over long periods of time. Barr bodyThe sex chromatin, the visible inactive X chromosome on the somatic cell nuclear membrane.
The tendency for natural selection to reduce variation is countered by mechanisms that preserve or restore variation, including diploidy and balanced polymorphisms.
LAMARC is a package of programs for computing population parameters, such as population size, population growth rate and migration rates by using likelihoods for samples of data (sequences, microsatellites, and electrophoretic s) from ...
Plasminogen activator inhibitor-1 (PAI-1) plasma levels have been consistently related to a polymorphism (4G/5G) of the PAI-1 gene. The renin-angiotensin pathway plays a role in the regulation of PAI-1 plasma levels.
See also: DNA, Sequence, Gene, Chromosome, Organ