Biology on Instagram: "🔬 Observing Chromosomes in Onion Cells Under a Microscope. Onion (Allium cepa) root tips are commonly used in biology labs to study mitosis, the process of cell division. This is because the root tip is a region of active growth, where cells are rapidly dividing, making it easier to observe chromosomes. What you see? - Interphase: The nucleus is visible, but chromosomes are not yet distinct. - Prophase: Chromosomes condense and become visible. - Metaphase: Chromosomes ali