2. The duplicated chromosomes coil into X-shapes and spindle fibres begin to form as the nucleolus dissolves and the nuclear membrane stars to break down.

3. Spindle fibres stretch across the cell from centrioles that move to opposite sides of the nucleus.

4. The nucleolus is completely dissolved and the centrioles reach the opposite sides.

5. The spindle fibres complete forming and they stretch towards the chromosomes.

6. The spindle fibres attach to the chromosomes at their centromeres.

7. The nuclear membrane is completely dissolved.

8. The spindle fibres begin tugging the chromosomes to line them up in the middle of the cell.

11. The spindle fibres retract and pull the chromosomes apart at the centromeres.

12. This allows sister chromatids to move to opposite sides of the cell.

13. They are each considered their own chromosomes now.

14. A set of chromosomes is at each end of the cell and the spindle fibres begin to disappear.

15. A nuclear membrane forms around each set of chromosomes.

16. A nucleolus appears in each new nucleus.

17. In animal cells, the cell membrane pinches together and the cytoplasm divides. In plant cells, a cell plate forms at the centre and divides the cells to become the new cell wall and membrane. The membrane would split here Animal cell Plant cell