What is the role of the spindle fibers during mitosis?

The role of spindle fibers during mitosis is crucial as they are responsible for the separation of chromosomes. During mitosis, once the chromosomes are condensed and aligned at the metaphase plate, spindle fibers attach to the centromeres of the chromosomes through structures called kinetochores. As mitosis progresses, the spindle fibers shorten, pulling the sister chromatids apart towards opposite poles of the cell. This ensures that each new daughter cell receives an identical set of chromosomes. The precise action of the spindle fibers is essential for the proper distribution of genetic material during cell division, thereby maintaining genetic stability in the daughter cells.