Mitosis Detective: Inside an Onion Root Tip

Be a detective inside an onion root. Find the part of the root that makes new cells, then count the cells in each phase of mitosis.

Predict, choose a sample, use the microscope, analyze your counts, answer five questions, then copy your data into your lab document.

Tap or click to choose. With a keyboard, use Tab, the arrow keys and Enter. The Next button at the bottom always shows what to do next. Open the Cell guide any time.

Mistakes are safe here. Wrong answers never cost points, and Start over clears everything.

The cells are drawn as a simple model of real stained onion root tip cells. Nothing is saved or sent. Reloading the page clears your work.

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