Can crossing over occur in both mitosis and meiosis?

Crossing over primarily occurs during meiOSis, specifically in prophase I, where homologous chromosomes exchange genetic material, leading to increased genetic diversity in gametes. In contrast, mitosis does not involve crossing over, as it is a process for cell division that produces two genetically identical daughter cells for growth and repair. While genetic recombination can occur in some forms of asexual reproduction, traditional mitosis itself does not include crossing over.

交叉互换主要发生在减数分裂（即我iOSis）过程中，特别是第一次减数分裂期间。在减数分裂中，同源染色体配对并交换遗传物质，这是形成遗传多样性的重要步骤。而有丝分裂（即mitosis）是用于复制体细胞的过程，期间不会发生交叉互换。因此，交叉互换不会在有丝分裂中发生。