crossing over

  1. the interchange of corresponding chromatid segments of homologous chromosomes with their linked genes.

Origin of crossing over

First recorded in 1910–15

Words Nearby crossing over Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use crossing over in a sentence

British Dictionary definitions for crossing over

crossing over

  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 (def. 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

Scientific definitions for crossing over

crossing over

  1. The exchange of genetic material between homologous chromosomes that occurs during meiosis and contributes to genetic variability.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.