Sample Submission Guidelines
Fact Sheet: Single Nucleotide Polymorphisms (SNPs)
What are SNPs? Single nucleotide polymorphisms, commonly called SNPs (pronounced “snips”), are the most frequent type of genetic variation among people, accounting for more than 90% of all differences between unrelated individuals. A SNP represents a difference in a single nucleotide. The DNA sequence contains four types of nucleotide bases: A (adenine), C (cytosine), G […]