Here's a breakdown:

* Prophase: Chromosomes condense and become visible.

* Metaphase: Chromosomes line up at the center of the cell.

* Anaphase: Sister chromatids (the replicated copies of each chromosome) are pulled apart by spindle fibers towards opposite poles of the cell.

* Telophase: The chromosomes reach the poles and the nuclear envelope reforms around them.

So, anaphase is the crucial phase where the duplicated genetic material is physically separated, ensuring each daughter cell receives a complete set of chromosomes.