Polymorphism

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A polymorphism is variation in the genome that is common to a number of people within a population. A polymorphism can be as small as a single base pair, called a single nucleotide polymorphism or SNP.

Usually a polymorphism is not harmful, but in some cases it can be involved in a disease, or predispose someone to a certain disease[1]. With genetic mapping on a large scale it is possible to uncover the genes involved in polymorphisms.

References

  1. Alberts, Bray, Hopkin, Johnson, Lewis, Raff, Roberts, Walter (2009), Essential Cell BIology, 3rd Edition, New York, Garland Science, Page 679
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