This happens in late anaphase or telophase. A cell of a species can have as many as 1,000. Usually that are 10-50. G 1 a period of growth and synthesis of new cell parts. Condensation of chromatin into visible sister chromatids with centromeres.
Microtubules disassemble and create spindles.
Centrioles, if present, separate and go to poles. Nuclear envelope has disintegrated. Chromatids line up at the equator of the cell with sister chromatids at right angles to the spindle. Sister chromatids separate. The spindle apparatus disappears.