Here's how it works:
* Spindle fibers are made up of microtubules, which are long, hollow protein filaments.
* During cell division, these fibers attach to the centromeres of the chromosomes.
* The fibers shorten, pulling the sister chromatids (in mitosis) or homologous chromosomes (in meiosis) apart to opposite poles of the cell.
Key points:
* Centrioles play a role in organizing the spindle fibers, but they don't directly pull the chromosomes apart.
* Microtubules are essential for the formation and function of the spindle fibers.
* Motor proteins are involved in the movement of the spindle fibers and the separation of chromosomes.
So, while various components contribute to the process, the spindle fibers are the primary force responsible for pulling the chromosomes apart during cell division.
