Mitotic Index Lab

Real onion root tip micrographs · IB DP Biology D2.1 Cell and nuclear division

100%
Light micrograph of a squashed onion root tip

These patients and numbers are fictional, made up for practice. In real diagnosis the mitotic index is one piece of evidence used alongside other tests.

Image credits

Onion root tip micrographs, resized for this page, with counting overlays added. Shared under the same licence (CC BY-SA 3.0).