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.
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After crossing-over occurs, chromosomes of each bivalent segregate independently relative to chromosomes of other bivalents in two consequent meiotic divisions.
Finally, as prophase I draws to a close and metaphase I begins, the crossing-over process concludes, and the homologous chromosomes prepare to separate.
28 apr 2017 · Crossing over is the exchange of genetic material between non-sister chromatids of homologous chromosomes during meiosis, which results in ...
7 giorni fa · This exchange process, called crossing over, results in chromatids that include both paternal and maternal genes and consequently introduces new ...
an exchange of genes or chromosome segments between corresponding parts of similar but usually not identical chromosomes during meiosis ...