SNPs: Single Nucleotide Polymorphisms
SNPs (pronounced “snips”) are differences in DNA sequence of just one (or sometimes a small number of) nucleotides. Where these differences occur within a genic sequence, they are more often than not phenotypically neutral, but sometimes they can be associated with a change in the amino acid sequence of the gene product. They are very common, and are distributed throughout the genome.
An example of a SNP between 2 small DNA sequences.