Definition of Crossing over
Crossing over: Exchanging genetic material between two paired chromosomes. Crossing over is a way to recombine the genetic material so that each person (except for identical twins) is genetically unique.
Source: MedTerms™ Medical Dictionaryhttp://www.medterms.com/script/main/art.asp?articlekey=2871
Last Editorial Review: 3/19/2012
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