Definition of crossing over in English:

crossing over


  • The exchange of genes between homologous chromosomes, resulting in a mixture of parental characteristics in offspring.

    • ‘Both predictions can be tested by examining patterns of gene conversion and crossing over in appropriately marked strains.’
    • ‘Recently, theoretical models have been developed that incorporate both crossing over and gene conversion.’
    • ‘Using these data, we investigate several alternative models of how gene conversion and crossing over may be associated.’
    • ‘The frequency of aberrant chromosomes resulting from ectopic crossing over was decreased 6-fold.’
    • ‘In this organism crossing over between X and Y chromosomes was shown for the first time in vertebrates.’


crossing over

/ˌkrôsiNG ˈōvər//ˈkräsiNG ˈōvər/