During Anaphase II, which is the third stage of Meiosis II, the sister chromatids, each now referred to as daughter chromosomes, begin their movement toward opposite poles of the cell. This phase is marked by the simultaneous splitting of the centromeres, which aligns the chromatids for their crucial separation. The tension from the spindle fibers pulls the sister chromatids apart, ensuring that as they move toward each pole, they maintain directionality with the centromere leading the way, allowing for organized and non-random chromosomal distribution. This step is essential for maintaining genetic integrity in the resulting gametes.