the process in cell division by which the nucleus divides,typically consisting of four stages,prophase,metaphase,anaphase,and telophase,and normally resulting in two new nuclei,each of which contains a complete copy of the parental chromosomes

• 有丝分裂，细胞分裂过程，其间细胞核分裂典型分为四步：前期、中期、后期和末期，并正常分裂成两个细胞核，每一个都含有母染色体的完全内涵