For questions about Single Nucleotide Polymorphisms (SNPs) as they pertain to genetic genealogy testing.
A single nucleotide polymorphism (SNP — pronounced snip), is a variation in a single nucleotide that occurs at a specific position in the genome, where each variation is present to some appreciable degree within a population (e.g. >1%) and is used in Ancestoral DNA matching and haplogroup definition.
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