MATURATION PHENOMENA 



207 



extraordinary hypothetical division during maturation, the 

 reduction division. 



The fulfilment of this prophecy by a host of different observers 



H 



FIG. 89. Middle and end phases of mitosis. G, Metaphase showing the 

 longitudinal split of the chromosomes; H, the end phase or anaphase with the 

 caughter chromosomes separating, between them the inter-zonal fibers (if); 

 tlie centrosomes are divided in preparation for the next following mitosis; 1 and 

 J, final stages in daughter nuclei formation and division of the cell; n, the dis- 

 carded nucleolus. (From Wilson.) 



was a remarkable justification of the imagination in science. 

 The reduction division in some form or other, often complicated 

 ;.nd atypical, was revealed in type after type of animals and 

 ] tlants until today it is generally if not quite universally accepted 

 as a typical phenomenon of maturation. 



