Chapter 10 Cell Growth and Division - PowerPoint PPT Presentation

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Chapter 10 Cell Growth and Division

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Title: Chapter 10 Cell Growth and Division Author: Lake Stevens Last modified by: Lake Stevens Created Date: 11/2/2009 9:02:58 PM Document presentation format – PowerPoint PPT presentation

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Title: Chapter 10 Cell Growth and Division


1
Chapter 10 Cell Growth and Division
  • Section 10-1 10-2

2
Cell Growth
  • Cells divide rather than get larger because.
  • Demands on DNA would be too great.
  • Cell would have trouble moving food and waste
    across the cell membrane.

3
If a cell got too large, it would be more
difficult to get oxygen in and waste products out.
  • Volume increases faster than surface area.

4
Chromosomes
  • Each organism has a specific number of
    chromosomes.
  • During cell division chromatin condenses into
    chromosomes.
  • In order for each cell to get the right number
    the chromosomes have to double

5
Parts of a chromosome
6
The Cell Cycle
  • Cell cycle The series of events that cells go
    through as they grow and divide.

7
Interphase
  • G1 Growth phase 1.
  • Cells increase in size and make new proteins
    and organelles.
  • S Synthesis. Chromosomes are replicated.
  • G2 Growth Phase 2
  • Cell division organelles are produced. Short
    phase.

8
Cell division
  • Cell division is made up of 2 parts.
  • 1. Mitosis division of the nucleus. Divided
    into 4 phases.
  • 2. Cytokinesis division of the cytoplasm.

9
Prophase
  • Chromosomes are visible.
  • Centrioles separate
  • Spindle fibers form
  • Nuclear membrane breaks down.

10
Metaphase
  • Chromosomes line up in the middle of the cell

11
Anaphase
  • Chromosomes are pulled apart/away from each other.

12
Telophase
  • The opposite of prophase occurs.
  • Chromosomes disappear back to chromatin
  • Nuclear membrane reforms
  • Spindle fibers break apart and disappear

13
Cytokinesis
  • Cytokinesis occurs right after Mitosis and is the
    division of the cytoplasm.

14
Can you tell the phase?
15
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