i MITOSIS 7 



somes, each of which subsequently divides into two daughter chromosomes. 

 The original series of chromosomes is thereby duplicated into two exactly 



v.- 



' r A ' * ' * 



mm% 

 '- 





B 



D 



-- 



00 



FIG. 3. 



Mitosis in Lepidosiren (mesenchyme cell). A, resting nucleus ; B, very early prophase ; C, D, middle 

 prophase ; E, late prophase. The nuclear membrane has disappeared and the chromosomes are becoming 

 attached to the spindle fibres. F, metaphase (seen from above). Only about half of the chromosomes are 

 shown. G, anaphase ; H, telophase, reconstruction of one of the daughter nuclei ; I, two of the chromosomes 

 from H, in transverse section and under a higher magnification. 



