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: Mahler, Erik 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
Friday, 10/23/15
  • Learning Target
  • Know the reasons for why cells divide.
  • Learning Outcome
  • I will know limitations to cell growth and
    structure of chromosomes.
  • https//www.youtube.com/watch?vxuG4ZZ1GbzI

3
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.

4
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.

5
Chromosomes
  • Made up of DNA wrapped around proteins!
  • Each cell of an organism has a specific number
  • Ex. Fruit flies 8
  • Ex. Austin Powers 46
  • Ex. Carrots - 18

6
Chromosomes
  • During cell division chromatin condenses into
    chromosomes.
  • In order for each cell to get the right number
    the chromosomes have to double

7
Parts of a chromosome
8
Monday, 10/26/15
  • Learning Target
  • Know the phases of Cell Division.
  • Learning Outcome
  • I will complete the Mitosis Flipbook.

9
The Cell Cycle
  • Cell cycle The series of events that cells go
    through as they grow and divide.

10
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.

11
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.

12
Prophase
  • Chromosomes are visible.
  • Centrioles separate
  • Spindle fibers form
  • Nuclear membrane breaks down.

13
Metaphase
  • Chromosomes line up in the middle of the cell

14
Anaphase
  • Chromosomes are pulled apart/away from each other.

15
Telophase
  • The opposite of prophase occurs.
  • Chromosomes disappear back to chromatin
  • Nuclear membrane reforms
  • Spindle fibers break apart and disappear

16
Cytokinesis
  • Cytokinesis occurs right after Mitosis and is the
    division of the cytoplasm.

17
Can you tell the phase?
18
Cell Division
  • Therefore, since cells can not become too large
    they need to divide into daughter cells
  • To do this the DNA first copies itself so each
    daughter cell receives exact copies of the
    genetic info needed for the cell
  • Also the ratio of surface area to volume
    increases which is a very good thing!

19
(No Transcript)
20
CELL CYCLE FLASHCARDS
  1. Identify the phases in the diagrams before
    cutting out.
  2. Cut out the diagrams.
  3. Glue diagrams to flashcards.
  4. On the back write the following
  5. Phase of cell cycle
  6. What is occurring in the diagram.
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