Chapter 9 Cell Division and Mitosis

Chapter 9 Cell Division and Mitosis - Chapter 9 Cell...

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Chapter 9 Cell Division and Mitosis I. Silver in the Stream of Time A. The cycle of life includes fertilization of gametes, cell division and growth, production of gametes, and death. B. All of life depends on the capacity of cells to divide. II. Dividing Cells: The Bridge Between Generations A. Overview of Division Mechanisms 1. Reproduction begins with the division of single cells. 2. Each new generation must receive a duplicate of all parental DNA and enough cytoplasmic machinery to start up its own operation. 3. Mitosis and meiosis are eukaryotic nuclear division mechanisms that lead to the distribution of DNA to new nuclei in forthcoming daughter cells. a. Mitosis is used by multicelled organisms for growth by repeated divisions of somatic cells. b. Meiosis occurs only in cells that divide to form gametes. 4. Cytokinesis is the actual cytoplasmic division of a parental cell into two daughter cells. B. Some Key Points About Chromosome Structure 1. Chromosomes are molecules of DNA complexed with proteins.
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