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crossing over

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noun Genetics.
  1. the interchange of corresponding chromatid segments of homologous chromosomes with their linked genes.
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Origin of crossing over

First recorded in 1910–15
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for crossing over

crossing over

noun
  1. biology the interchange of sections between pairing homologous chromosomes during the diplotene stage of meiosis. It results in the rearrangement of genes and produces variation in the inherited characteristics of the offspringSee also linkage (def. 4)
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

crossing over in Medicine

crossing over

n.
  1. The exchange of genetic material between homologous chromosomes that occurs during meiosis and contributes to genetic variability.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

crossing over in Science

crossing over

  1. The exchange of genetic material between homologous chromosomes that occurs during meiosis and contributes to genetic variability.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.