IB skill practice

Analyse cell cycle and mitosis

Paper 1, Paper 2 5 marks Difficulty 4

Calculate mitotic index

In a Melbourne DP Biology class, \(4\) out of \(24\) observed cells are in mitosis. Calculate the mitotic index as a percentage. Use the diagram labels, allele model, food-web arrows, or data values before answering. Enter the answer and choose the interpretation that best matches the biological evidence.

Worked practice: biological evidence and answer

Use the labelled biological evidence first, then connect it to the final answer.