crossing over

crossing over definition - medical

cross·ing o·ver or cross·ing-o·ver (krôˌsĭng-ōˈvər)

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

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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