54 ZOOLOGY DIEECTIONS 



2. Prophase. Chromatin becoming arranged in masses, 

 usually forming a coiled thread, the spireme. Fig. 2. 



3. Metaphase. The chromatin thread has broken into 

 chromosomes which have become arranged in the equatorial 

 plate. In this stage each chromosome has split longitudinally but 

 because of their minute size in some kinds of preparations the 

 individual chomosomes are not readily observable. Fig. 3. 



4. Anaphase. Chromosomes moving toward each pole of 

 the spindle. Fig. 4. 



5. Telophase. The construction of the two daughter 

 nuclei. This is usually accompanied by a cleavage of the cell, 

 whereby the two daughter nuclei become the nuclei of two 

 daughter cells. Fig. 5. 



reference 



Wilson, E. B., 1925. The Cell in Development and Heredity. 

 Macmillan. 



