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Definition of Gene, evolutionarily conserved

Gene, evolutionarily conserved: A gene that has remained essentially unchanged throughout evolution. Conservation of a gene indicates that it is unique and essential. Changes in the gene are likely to be lethal.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=3563
Last Editorial Review: 3/19/2012

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