Single nucleotide polymorphisms, or SNPs, are variations within the genome at specific bases of A, C, T, and G. Generally, they are defined as positions where 1% or more of the bases differ from what you would expect against the ‘reference’ human genome. The human genome contains about 3 billion base pairs, and each individual has about 10 million SNPs.

Learn more >> https://ghr.nlm.nih.gov/primer/genomicresearch/snp

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