crossing over

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noun Genetics.

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

Words nearby crossing over

crosshatch, crosshead, cross index, crossing, crossing guard, crossing over, crossjack, cross-legged, crosslet, crosslight, crossline

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use crossing over in a sentence

They are always suspended over a precipice, dangling by a slender thread that shows every sign of snapping.
How the PC Police Threaten Free Speech|Nick Gillespie|January 9, 2015|DAILY BEAST
And now, similarly, former Arkansas governor Mike Huckabee: "Bend over and take it like a prisoner!"
Huckabee 2016: Bend Over and Take It Like a Prisoner!|Olivia Nuzzi|January 8, 2015|DAILY BEAST
Perhaps on his own nowadays, Epstein is trying his best to webmaster over a dozen URLs.
Sleazy Billionaire’s Double Life Featured Beach Parties With Stephen Hawking|M.L. Nestel|January 8, 2015|DAILY BEAST
But yes, I pictured a James Bond-type just sauntering over to her.
‘Archer’ Creator Adam Reed Spills Season 6 Secrets, From Surreal Plotlines to Life Post-ISIS|Marlow Stern|January 8, 2015|DAILY BEAST

The debate over who really pulled off the Sony hack, then, could continue indefinitely.
Was Sony Hit With a Second Hack?|Shane Harris|January 8, 2015|DAILY BEAST
It is most peculiar, and when he plays that way, the most bewitching little expression comes over his face.
Music-Study in Germany|Amy Fay
All over the world the just claims of organized labor are intermingled with the underground conspiracy of social revolution.
The Unsolved Riddle of Social Justice|Stephen Leacock
After we had passed over this desert, we found several garisons to defend the caravans from the violence of the Tartars.
The Life and Most Surprising Adventures of Robinson Crusoe, of York, Mariner (1801)|Daniel Defoe
After relievedly giving the pistol to the nearest soldier, he stumbled quickly over to Brion and took his hand.
Sense of Obligation|Henry Maxwell Dempsey (AKA Harry Harrison)
Solely over one man therein thou hast quite absolute control.
Pearls of Thought|Maturin M. Ballou

British Dictionary definitions for crossing over

crossing over

noun

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)

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

crossing-over

(krô′sĭng-ō′vər)

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

crossing over

Origin of crossing over

Words nearby crossing over

Words related to crossing over

How to use crossing over in a sentence

British Dictionary definitions for crossing over

Scientific definitions for crossing over