In the anaphase the chromosome moves to their respective poles. They move in such a fashion that it appears that the centormere leading the arms of chromosomes.
They are being pulled apart to opposite sides of the cell. Each has a spindle fiber attached to it, and in Metaphase (the previous stage) they are lined up across the equator of the cell.
Depending on how much detail you want..... during anaphase the sister centromeres move apart and move to the polar spindals (formed from the old nuclear membrane), with the centromeres clearly devided