what moves the chromatids during mitosis

During mitosis, spindle fibers move the chromatids around and guide their movement. The spindle fibers are specialized microtubule structures that attach to the chromosomes and pull them towards the poles of the cell as they shorten and move towards the poles. The spindle fibers are anchored by centrioles. The movement of the chromatids ensures that each daughter cell will contain one exact copy of the parent cell DNA.