A single nucleotide polymorphism (abbreviated SNP, pronounced snip) is a genomic variant at a single base position in the DNA. Scientists study if and how SNPs in a genome influence health, disease, drug response and other traits.
A SNP is a one-letter place where your genome varies from another genome sequence. Thanks to the Human Genome Project, we have found that these single letter changes in our genetic code are placed all across our genomes. We can see that the patterns vary between people and even between populations.
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