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

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

Next came an overnight bus ride to their final destination: tiny Swink, Colo., where Japanese American farmers had previously employed Alvarado’s wealthier uncles, writing a letter of recommendation this time to make crossing over easier.

From Los Angeles Times

Labour has also pledged tougher action to deal with small boat crossings over the English Channel, which are set to break record numbers this year.

From BBC