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

This followed a statement by the defence minister, Israel Katz, who said Israeli forces had been instructed to destroy the crossings over the Litani river that were being used by Hezbollah to send reinforcements.

From BBC

He said the flight took a route down along Saudi Arabia, before "crossing over Israel".

From BBC

The canal ran parallel on the other side, with a bridge crossing over it at the far end of the street.

From Literature

But she ignored me, her arms crossing over her chest as she stood a little taller and looked at Callaway.

From Literature

Elisha and his remaining crew had spent eighty-four days crossing over ice, until they found open waters and set sail on the smaller whaling boats.

From Literature