Prophase and Metaphase

During which phase does the nuclear membrane break down and move to the side into a vesicle?

When do the spindle fibers attach to the centromere and move the chromosomes to the center of the cell?

At which stage do the sister chromatids face opposite poles of the cell?

When do the spindle fibers shorten and split the centromere?

At which stage do the chromatids reach their respective poles and a nuclear membrane reforms around each set of chromosomes?

During which phase do the cytoplasm separate and move to opposite poles, creating centrioles?

When are the chromosomes still in the diploid stage?

At which stage do the spindle fibers attach to the centromere and move the chromosomes to the center of the cell (equatorial plate)?

When do the spindle fibers shorten and split the centromere?

At which stage do the chromatids reach their respective poles and a nuclear membrane reforms around each set of chromosomes before they uncoil?