crossing over

American  

noun

Genetics.

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

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crossing over British  

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

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crossing over Scientific  

/ krô′sĭng-ō′vər /

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

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Etymology

Origin of crossing over

First recorded in 1910–15

Example Sentences

She and a group of friends had gone backcountry mountain climbing and skiing, crossing over glaciers and racing down snowy peaks hundreds of miles away from Mount St. Helens.

From Literature

The band was a key part of a phenomenon known as Hallyu, which describes South Korean pop culture crossing over to the west.

From BBC

We finally parked underneath the Little Village Arch, a colonial-style gateway crossing over the part of 26th Street where Uber dropped me off earlier.

From Los Angeles Times

Collections were especially weak in the Upper Midwest, reflecting a drop in crossings over the Canadian border, and were strongest in the richest states with the biggest shares of investment banking activity.

From Barron's

Twenty captives were crossing over Israel’s border to jubilant homecomings, but Bipin wasn’t among them.

From The Wall Street Journal