1. The space environment had stimulating mitosis action on root tip cells. Other mutagens had inhibiting mitosis action. 空间环境促进根尖细胞有丝分裂活动，其它诱变因素均不同程度地抑制根尖细胞有丝分裂活动。
2. There were detestably close synapses between homologous chromosomes during thellateprophase and early metaphase in mitosis of somatic cells. 发现在其有丝分裂的晚前期、中期阶段，咯对同源染色体都在进行联会。
3. There are two types of cell division: meiosis and mitosis. 细胞分裂分为两种：有丝分裂与减数分裂。
4. Some of the reconstituted cells were found in different stage of mitosis. 发现在重组细胞中有一些是处于有丝分裂的各个阶段。
5. Cell division is the process by which cells reproduce. There are two types of cell division: mitosis and meiosis. 细胞分裂是细胞繁殖的过程，可透过两种形式进行：有丝分裂和减数分裂。
