SPERMATOZOON 3 



6. After the formation of the diasters the chromosomes 

 unite to form a spireme at each pole. From this con- 

 dition they change into the resting stage or reticular 

 condition. Coincident with the nuclear changes, the 

 cytoplasm may have become constricted into masses, or 

 separated by the formation of a wall perpendicular to the 

 axis of the spindle. The resultant masses are known as 

 daughter cells. The daughter cells may move apart or 

 remain in contact. These final stages are known as the 

 telo phases. 



Draw a telophase in which the chromatin is in a spireme 

 (di-spireme) . Label the parts. Draw two daughter cells. 

 Label the parts. 



The cell has been followed through the process of divi- 

 sion, known as karyokinesis or mitosis. As a result of this 

 division there are two cells instead of one. Write out 

 the description of the process of mitotic cell division 

 from the resting stage to the daughter cells. 



THE SPERMATOZOON 



With the high power objective examine the slide of the 

 pig spermatozoa. Select a single spermatozoon. It is 

 composed of two parts, a large ovoid head and a long fila- 

 mentous tail. The anterior part of the head, the head 

 cap, does not stain so intensely as the remainder of it. 

 At the base of the head is a part that stains very in- 

 tensely. This is the mid-piece. What is the com- 

 parative length of the tail? 



Make a drawing of the spermatozoon and label all the 

 parts. <. 



