Humber Admissions Practice Test

Cytokinesis refers specifically to the division of the cytoplasm during cell division, a crucial process that follows the separation of the genetic material during mitosis or meiosis. It ensures that each daughter cell receives not only a complete set of chromosomes but also the necessary cellular components and organelles to function properly once division is complete.

In contrast, other options describe different processes that occur during cell division. The replication of chromosomes, for example, occurs during the S phase of the cell cycle, preparing the genetic material for distribution to the daughter cells. The separation of sister chromatids takes place during anaphase, which is a stage of mitosis, ensuring that each new cell will receive an identical set of chromosomes. The reformation of the nuclear envelope occurs toward the end of mitosis and helps in encasing the newly formed nuclei of the daughter cells. Thus, while all these processes are integral to cell division, cytokinesis specifically pertains to the physical division of the cytoplasm itself.