Multiple choice How many sub-stages are present in the prophase I of meiosis I? Two Three Four Five Reveal answer Fill a bubble to check yourself D Correct answer Explanation Prophase I of meiosis I has five sub-stages: leptotene (chromosomes condense), zygotene (synapsis begins), pachytene (crossing over occurs), diplotene (chiasmata visible), and diakinesis (final condensation).