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Polymorphisms


Polymorphisms
A polymorphism is a genetic variant that appears in at least 1% of a population.
Examples: ...
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Dr. Francis Collins, director of the National Human Genome Research Institute, defines single nucleotide polymorphisms (SNPs).
related
terms:
deoxyribonucleic acid (DNA), inherited, nucleotide, polymorphism, genetic code (ATGC) ...
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Polymorphisms in the lengths of tandemly repeated short sequences can be used as molecular markers on the genetic chromosome.
Facts ...
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Polymorphisms. Variant forms of a particular gene that occur simultaneously in a population.
Polynucleotide. A DNA polymer composed of multiple nucleotides. (See Nucleotide.) ...
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The polymorphisms due to restriction fragment length variations in the genomes in a human population had been studied intensely in the past.
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Single Nucleotide Polymorphisms (SNPs)
An explanation of single nucleotide polymorphisms (SNPs).
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Spatial and Temporal Colinearity ...
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The use of DNA polymorphisms to detect the presence of a disease gene. DNA fingerprint.
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Next they tried to determine if the distribution of polymorphisms is due to drift or selection. They did this by calculating the Fst value for each polymorphism.
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Many small regions of DNA that vary among individuals (called polymorphisms) also were identified during the HGP, mostly single nucleotide polymorphisms (SNPs).
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Restriction fragment length polymorphisms (RFLP) are variation in DNA fragment banding patterns of electrophoresed restriction digests of DNA from different individuals of a species.
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Restriction Fragment Length Polymorphisms
Restriction enzymes cut DNA wherever their "recognition site" (usually between 4 and 8 bases in length) occurs in the DNA sequence.
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To 'genotype' (verb) is to example polymorphisms (e.g. RFLPs, microsatellites, SNPs) present in a sample of DNA. You might be looking for linkage between a microsatellite marker and an unknown disease gene.
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Interleukin-10 and transforming growth factor-beta promoter polymorphisms in allergies and asthma. Am J Respir Crit Care Med. 158 (6), 1958-1962.
population genetics study: Burchard, E.G.; Silverman, E.K.; Rosenwasser, L.J.; Borish, L.; Yandava, C.
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restriction fragment length polymorphisms (RFLPs)
Differences in DNA sequence on homologous chromosomes that result in different patterns of restriction fragment lengths (DNA segments resulting from treatment with restriction enzymes); ...
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A technique for detecting polymorphisms at a particular locus. Following PCR amplification of a locus, polymorphisms are detected by differences in restriction fragment sizes between individuals.
Related Terms: Polymorphism ...
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A technique for identifing polymorphisms at a particular locus. The locus is amplified by PCR, followed by digesting with restriction enzymes. Polymorphisms may result in different size restriction fragments.
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The markers where hybridization occurred are referred to as RFLPs (restriction-fragment-length polymorphisms). The longer fragment in sickle-cell individuals is interpreted as evidence of a mutation in the recognition sequence.
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(two or more) forms of a particular gene inherited separately from each parent; usually found at the same locus on homologous chromosomes. Equivalent genes in the two sets might be different, for example because of single nucleotide polymorphisms.
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restriction fragment length polymorphisms (RFLPs) Variations, among individuals in a population, in the length of certain restriction fragments within which certain genomic sequences occur.
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