Cell Cycle  
 

Read the pages indicated by G-6 and study behavioral objective 9. After a cell passes through the S stage and G2 stage of the cell cycle it is ready to ready to move through the mitotic stage where the DNA molecules (nuclear material) form into chromosomes and segregate into two groups. The mitotic portion is divided into four phases - prophase , metaphase, anaphase and telophase. These are represented by E, F,G, H,and I in the figure above. After the cell has finished these four phases the cytoplasm will separate into two cells with each cell containing one of each groups of nuclear material. This process is called cytokinesis. Read in your text the description for the four phases of mitosis. Write in your notes a description of what occurs to the following structures during each of these four phases: chromatin, chromosomes, centrioles, nucleoli, nuclear membrane, spindle apparatus (spindle fibers), centromere. 
 
   
 

Compare your description of the events which occur during each stage of mitosis to the descriptions 
in the coming lessons: 

 
14. Which of the following statements is true concerning a comparison between  the interphase and prophase figure above? 

    a) Prophase has twice the amount of DNA molecules compare to 
        interphase. 
    b) Prophase has twice the number  of chromosomes as interphase. 

 Press here to check answer.  press  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

  From you readings  list the various events which occur during prophase . Click here to  check answer. click 
 
 
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