What are single nucleotide polymorphisms?

Question

Logan Allen · Accepted Answer

A single nucleotide polymorphism is a variation in a nucleotide that occurs at a specific location on the genome.

A single nucleotide polymorphism is a variation in a nucleotide that occurs at a specific location on the genome. If a change in nucleotide is found in more than 1% of the population, it is considered a single nucleotide polymorphism. Single nucleotide polymorphisms, or SNPs, are passed down to future generations.

In the example below, the A has been replaced with a G.

SNPs occur naturally and most have no discernible affect on health or development. SNPs are responsible for much of the genetic variation found between humans. SNPs can occur in coding and noncoding regions of DNA. If a SNP occurs within a gene, this gene has multiple alleles.

Ivy Acosta · Answer

undefined SNPs, or single nucleotide polymorphisms, are variations in a single nucleotide that happen at a specific position in the genome and can be found in both coding and non-coding regions of DNA. These variations can affect traits, susceptibility to diseases, and response to medication. SNPs can be used as markers to identify genetic differences among individuals or populations.