Question: what is the difference between kinetochore fibers and polar fibers?
Answer: Kinetochore fibers attach to a disk-shaped protein—called a kietochore—that is found in the centromere region of each chromesome. Kinetochore fibers extend from the kinetochore of each chr matid to one of the centrosomes. Polar fibers extend across the dividing cell from centrosome to centrosome.