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Home >Information for Patients > Dictionary Index

Dictionary of Cancer Terms

Tagging SNP
A single nucleotide polymorphism, or SNP (pronounced “snip”), that is used to “tag” a particular haplotype in a region of the genome. As a subset of all of the SNPs in the genome, tagging SNPs can be extremely useful for testing the association of a marker locus with a qualitative or quantitative trait locus in that it may not be necessary to genotype all of the SNPs. Also called tagSNP.

Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.