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 (sense 4)
crossing-over in American English
(ˈkrɔsɪŋˈoʊvər)
noun
an exchange of equivalent genetic material between homologous chromatids during meiosis
Examples of 'crossing over' in a sentence
crossing over
Coker was standing as close to the crack as he could get without crossing over, beckoning to her.
Clive Barker EVERVILLE (2001)
She was crossing over the road towards Cadogan Park in a state of some distress.
David Cavanagh MUSIC FOR BOYS (2001)
So, any American crossing over to Moscow who reaches Helsinki is safe.