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The process of crossing over, which occurs during meiosis I. It involves breakage in the same position of each of a pair of non-sister chromatids from homologous chromosomes, followed by joining of non-sister fragments, resulting in a reciprocal exchange of DNA between non-sister chromatids within an homologous pair of chromosomes.
Publication Source: Food and Agricultural Organization of the United Nations (FAO)
Publication Date: 1999
See also: Crossing Over
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