3.24c

• the first sign of the chromosomes splitting is when we see the nuclear membrane start to break down' and the chromosomes become visible as a pair of chromotids
•this is known as 'prophase'
• with the nucleus gone a network of protein molecules called 'spindle' which extend from one pole of the cell to the other
• what happens is the chromotids connect to one of the spindles called 'metaphase'
• the chromosomes are in the middle of the cell (at the equator)
• anaphase - the fibre shortens pulling one chromotip in one direction and the other one in the opposite direction and the pair separates and move towards the poles of the cell
• telophase - the nucleus begins to reform at either end, creating two new cells
• cytokinesis - the cell finally splits into two (NOT REGARDED AS PART OF MITOSIS) now both cells include one chromosome.
• in human cells we see 23 cells cells seperating instead of two