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  1. Apr 27, 2017 · Crossing over is the exchange of genetic material between non-sister chromatids of homologous chromosomes during meiosis, which results in new allelic combinations in the daughter cells. Learn how crossing over occurs, what are its functions, and how it affects linkage maps and inheritance patterns.

  2. 2 days ago · Crossing Over. Crossing over is a cellular process that happens during meiosis when chromosomes of the same type are lined up. When two chromosomes — one from the mother and one from the father — line up, parts of the chromosome can be switched. The two chromosomes contain the same genes, but may have different forms of the genes.

  3. Chromosomal crossover, or crossing over, is the exchange of genetic material during sexual reproduction between two homologous chromosomes' non-sister chromatids that results in recombinant chromosomes.

  4. Learn how chromosomal crossover increases genetic variation in gametes and offspring during prophase I of meiosis. Watch a video and read comments from other learners and experts.

    • 12 min
    • Sal Khan
  5. Learn how meiosis reduces chromosome number by half and how crossing over creates genetic variation. Crossing over is the exchange of DNA between homologous chromosomes during prophase I of meiosis.

  6. Learn about meiosis, the process of cell division that produces gametes (sex cells) in humans. Crossing over is a process in which homologous chromosomes trade parts during prophase I of meiosis.

  7. Learn how crossing over is the exchange of genetic information between homologous chromosomes during prophase I of meiosis I. See how crossing over produces allelic diversity and unique offspring in humans.

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