Definitions for "Single nucleotide polymorphisms"
Keywords:  snp, snip, nucleotide, dna, variation
Relationships between genes and probing populations for variations in the genetic code that may increase one's risk for a particular disease or determine one's response to a given medication.
A change of a single base in a genetic sequence that is present in at least 1% of the population for a specific gene, e.g., the substitution of an A for a G in gene X.
A change in a single nucleotide (A, T, C, or G) in a gene sequence causing a change in expression of the gene in the individual's phenotype.