General Biology I · Module 9 · The cell cycle and mitosis

Cell Cycle and Mitosis Walkthrough

Watch DNA wind into chromosomes, copies get made and checked, the spindle grab and split sister chromatids, cells pinch in two, cyclins rise and fall, and brakes fail in cancer. Go at your own pace. Nothing here is graded.

Speed

Think of it like this

Quick check

Wrong answers are fine here. Read why, then try again.

Dr. Akash Garg · General Biology I Study Tools · Drawings are simplified and not to scale. CC BY-NC-SA 4.0
Use the left and right arrow keys to move between steps. Timings are speeded up for viewing, and most cells are drawn with only two or three chromosome pairs so you can follow each one. Practise next in the Cell Cycle and Mitosis Lab.