(I)GCSE Topic 3.24 c) Mitosis 3

- DNA Replication occurs during the Interphase

- For a sign that the cell is entering the stages of Mitosis and cell devision is when we see the breakdown of the nuclear membrane = PROPHASE

- Membrane breaks down and the chromosomes are visible as a pair of CHROMATIDS

- Inside the cell, the nucleus is gone and replaced with a network of protein molecules = SPINDLE / SPINDLE FIBERS

- 'Late Prophase' = pair of chromatids move towards the spindle

- METAPHASE = chromosomes are in the middle -arranged across the equator- of the cell 

- ANAPHASE = the spindle fibre shortens, pair of chromatids move apart to the polls of the cell = separation of chromatids

- TELOPHASE = nucleus begins to reform around the chromosomes at either end of the cell

*Not part of Mitosis*

- CYTOKINESIS = the cell splits into two 

= cell bends inwards, dividing cytoplasm in half 

= membrane will fuse across the equator to form the two cells

*2 new cells each contain a new chromosome-same as the parental cell*