TAILIEUCHUNG - Lecture Biology (6e): Chapter 12 - Campbell, Reece
Lecture Biology (6e) - Chapter 12: The cell cycle. This chapter presents the following content: Cell division functions in reproduction, growth, and repair; cell division distributes identical sets of chromosomes to daughter cells. | CHAPTER 12 THE CELL CYCLE Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Section A: The Key Roles of Cell Division 1. Cell division functions in reproduction, growth, and repair 2. Cell division distributes identical sets of chromosomes to daughter cells The ability of organisms to reproduce their kind is one characteristic that best distinguishes living things from nonliving matter. The continuity of life from one cell to another is based on the reproduction of cells via cell division. This division process occurs as part of the cell cycle, the life of a cell from its origin in the division of a parent cell until its own division into two. Introduction Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings The division of a unicellular organism reproduces an entire organism, increasing the population. Cell division on a larger scale can produce progeny for some multicellular organisms. This includes organisms that can grow by cuttings or by fission. 1. Cell division functions in reproduction, growth, and repair Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Fig. Cell division is also central to the development of a multicellular organism that begins as a fertilized egg or zygote. Multicellular organisms also use cell division to repair and renew cells that die from normal wear and tear or accidents. Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Fig. Fig. Cell division requires the distribution of identical genetic material - DNA - to two daughter cells. What is remarkable is the fidelity with which DNA is passed along, without dilution, from one generation to the next. A dividing cell duplicates its DNA, allocates the two copies to opposite ends of the cell, and then splits into two daughter cells. Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings A cell’s genetic information, packaged as DNA, is called its genome. In .
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