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Definition of Retroposition

Retroposition: 1. Simple backward displacement of a structure or organ such as the uterus.
2. In genetics, the integration of a sequence derived from RNA into a DNA genome. Messenger RNA (mRNA) is reverse-transcribed and reintegrated into the genome. Retroposition is an important mechanism of gene copying. It produces a large number of functional genes in the genome and accounts for about 10,000 duplications in the human genome.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=26283
Last Editorial Review: 6/14/2012

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