So basically, this is one sister chromatid, and this is a second sister chromatid. This is one sister chromatid, and this is a second one, and so forth. And these cystochromatids are identical because in interface, we replicate, we use the first original to form the second replicated cystochromatid. So during this phase of anaphase, the spindle fibers pull the identical chromosome pairs apart by breaking our centromeres. And this is shown in this diagram. And when we break the centromeres, each one of these chromatids has its own unique centromere region.