Mitotic Index: Counting Cells in a Root Tip

A simulated field of 100 cells from the growing tip of an onion root. Find the ones that are dividing, tag every cell, and work out how long each phase of the cell cycle actually lasts. A new field is dealt every time this page loads, so write down your Field ID.

Open the activity in its own tab — useful on a small screen, or if the activity does not appear above.

List of terms