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crossing over

noun, Genetics.
1.
the interchange of corresponding chromatid segments of homologous chromosomes with their linked genes.
Origin of crossing over
1910-1915
1910-15
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for crossing over
Contemporary Examples
Historical Examples
  • With this he returned into the hut, and, crossing over, held it near the head of the corpse.

    The Maroon Mayne Reid
  • "Um-hm," repeated Dorinda, crossing over to Greenland, so to speak.

    The Rise of Roscoe Paine Joseph C. Lincoln
  • To shame himself, he took his lamp in his hand, and crossing over to the far corner where the skeleton stood, examined it.

    Novel Notes Jerome K. Jerome
  • He rose, and crossing over to Hooker's table, clapped him heartily on the back.

  • Two of them just in front of me were crossing over the stream on a thick and broad archway of ice.

    In the Forbidden Land Arnold Henry Savage Landor
  • And, crossing over, close under the windows of the club, she hurried home.

    Beyond John Galsworthy
  • Where the road is off the ground as when crossing over a small depression, these sleepers must not be over five feet apart.

    Motor Truck Logging Methods Frederick Malcolm Knapp
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 offspring See also linkage (sense 4)
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
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crossing over in Medicine

crossing over cross·ing o·ver (krô'sĭng) or cross·ing-o·ver (krô'sĭng-ō'vər)
n.
The exchange of genetic material between homologous chromosomes that occurs during meiosis and contributes to genetic variability.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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crossing over in Science
crossing over or crossing-over
  (krô'sĭng-ō'vər)   
The exchange of genetic material between homologous chromosomes that occurs during meiosis and contributes to genetic variability.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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11
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