SNP array
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See also: DNA microarray and SNP genotyping
In molecular biology, SNP array is a type of DNA microarray which is used to detect polymorphisms within a population. A single nucleotide polymorphism (SNP), a variation at a single site in DNA, is the most frequent type of variation in the genome. Around 335 million SNPs have been identified in the human genome,[1] 15 million of which are present at frequencies of 1% or higher across different populations worldwide.[2]