IB skill practice

Analyse cell cycle and mitosis

Paper 1, Paper 2 5 marks Difficulty 4

Identify mitosis stage

A microscope image in a school genetics workshop shows chromosomes lined up across the middle of a dividing cell. Identify the mitosis stage and explain the evidence. 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.