Single nucleotide polymorphism (SNP)

A single nucleotide polymorphism (SNP) is a small variation in our DNA sequence, where one base (building block) is different among individuals. These differences are common and can influence traits like eye color or how we respond to medicines. For example, in a specific spot in the DNA, one person might have an A, while another has a G. SNPs help scientists study genetic diversity, understand disease risks, and develop personalized treatments. They are the most common type of genetic variation among people and contribute to our unique biological makeup.