c Prometaphase 



e Late anaphase 



b Mid-prophase 



B / .B 



S A 



EP 





d Meta phase-ana phase 



f Telophase 



Fig. 2. — Diagrams of the main stages of mitosis. Only two 

 pairs of chromosomes A and A', B and B' are shown. 

 Both of these have sub-terminal spindle attachments, 

 those of the B chromosomes being nearer the end. At 

 early prophase the ' relic spirals ' are clearly seen. 

 S.A. == spindle attachments, E.P. = equatorial plane of 

 the spindle. R and L are regions of the chromosomes 

 which are spiralized in a right- or left-handed direction 

 at metaphase. 



