-the chromatids separate, and each chromatid is -then referred to as a chromosome. -the chromosome number is double, and there are two identical sets of chromosomes. -Centriole synthesis & other raw materials needed for cell division -The chromosomes, assisted by the spindle fibers, move toward the centrioles at each end of the cell. Separation of the chromatids signals the beginning of this phase, and, by the time this phase has ended, the chromosomes have reached the poles