SNP

A SNP, or single nucleotide polymorphism, is a tiny difference in the DNA sequence between individuals. DNA is made up of billions of building blocks called nucleotides, and a SNP occurs when a single nucleotide is different at a specific position. These variations can influence traits like eye color, height, or disease risk, and are common in the human genome. Most SNPs have no effect, but some can impact how genes function. Studying SNPs helps scientists understand genetic diversity, inheritance, and health-related traits.