| 单词 | crossing over |
| 释义 | crossing overnoun Genetics.the interchange of corresponding chromatid segments of homologous chromosomes with their linked genes. Origin of crossing overFirst recorded in 1910–15 Words nearby crossing overcrosshead, cross index, cross infection, crossing, crossing guard, crossing over, crossjack, cross-legged, crosslet, crosslight, crossline Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for crossing overcrossing over nounbiology 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) 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 Medical definitions for crossing overcrossing over 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. Scientific definitions for crossing overcrossing over 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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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