Lab 2 Worksheet - Lab 2 Worksheet The Cell Cycle and Cancer...

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Lab 2 Worksheet: The Cell Cycle and Cancer Video Script The cell cycle is a complex series of continuous events consisting of Interphase and mitosis. During Interphase, the nucleus and the darker stained nucleolus can be clearly seen. The DNA is copied. The chromosomes can not yet be seen because they are still in the form of uncoiled chromatin. In animal cells the centrioles duplicate themselves. In prophase the chromatin coils to form visible chromosomes. The nuclear envelope and nucleolus disappear and a spindle forms between the pairs of centrioles, which have moved to opposite ends of the cell. In metaphase, the chromosomes move to the equator of the spindle. With each chromotid attached to a separate spindle fiber by its centromere. During anaphase, the centromeres split and the sister chromatids are pulled apart to opposite poles of the cell. Each chromatid is now a separate chromosome. Telophase is the final phase of mitosis. In Telophase two daughter cells are formed with a complete set of chromosomes at each end of the cell. The cytoplasm divides the nucleolus and nuclear envelope reappear and the chromosomes begin to uncoil. When the new cells are separated they enter Interphase and a new cycle begins. 1. Next, click on the “Information” button to learn more about cancer. 2. If you come upon terms that are unfamiliar to you, please refer to your textbook for further explanation or search the word here: http://encarta.msn.com/encnet/features/dictionary/dictionaryhome.aspx 3. Click on the microscope to begin learning about the phases of mitosis; click on the picture of each phase of mitosis to study each phase separately.
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