Final answer:
Mitosis is divided into five stages: prophase, prometaphase, metaphase, anaphase, and telophase. Spindle fibers play a crucial role in separating sister chromatids during anaphase.
Step-by-step explanation:
Mitosis is divided into five stages: prophase, prometaphase, metaphase, anaphase, and telophase. During prophase, the chromosomes condense and the nuclear envelope breaks down. In metaphase, the chromosomes line up at the center of the cell. During anaphase, the sister chromatids separate and move to opposite ends of the cell. In telophase, the chromosomes decondense and the nuclear envelope reforms.
Spindle fibers play a crucial role in mitosis. They help separate sister chromatids during anaphase by attaching to the centromeres of the chromosomes and pulling them apart. Without spindle fibers, the proper distribution of chromosomes to daughter cells would not occur.