What phase of mitosis is it when chromosomes align on the spindle equator?

The phase of mitosis when chromosomes align on the spindle equator is called metaphase. During this stage, the chromosomes, which have already been duplicated and condensed, are positioned along the metaphase plate, ensuring that each sister chromatid is attached to spindle fibers from opposite poles. This alignment is crucial for the accurate separation of chromosomes in the subsequent phase, anaphase.