Chapter 5 Cell Growth and Division Section 1

Chapter 5: Cell Growth and Division Section 1: The Cell Cycle Chp 5. 1

Chapter 5: Cell Growth and Division Do Now! Section 1: The Cell Cycle What do multicellular organisms use this type of cell division for? a) Growth and development b) Producing gametes c) Halving the number of chromosomes d) Getting rid of cancer

Chapter 5: Cell Growth and Division Section 1: The Cell Cycle Agenda • The Cell Cycle • Mitosis Foldable Activity • Mitosis • Go over homework

Chapter 5: Cell Growth and Division Section 1: The Cell Cycle What are three parts of the cell theory? 1) The cell is the most basic unit of life 2) All living things are made of cells 3) All cells come from other cells But HOW do cells come from other cells?

Chapter 5: Cell Growth and Division • The Cell Cycle Why might cells need to make more cells? Section 1: The Cell Cycle • Just like all other forms of life, individual cells (even yours!) go through different stages of growth. • Since this process happens over and over again in the daughter cells (the cells that get made), it is called a Cell Cycle. • What are the different stages?

Chapter 5: Cell Growth and Division Section 1: The Cell Cycle Draw this chart in your notebook. We will fill it out during the next slide!

Chapter 5: Cell Growth and Division INTERPHASE: Gap 1 (G 1) Synthesis (S) Gap 2 (G 2) and then… MITOSIS! Section 1: The Cell Cycle

Chapter 5: Cell Growth and Division Interphase Section 1: The Cell Cycle • In Gap 1, the cell is growing and carries out its normal functions. ü The cell also checks to make sure the cell can continue to S phase. • During Synthesis, the cell creates a copy of its DNA (doubles its chromosomes).

Chapter 5: Cell Growth and Division The Cell Cycle Section 1: The Cell Cycle • In Gap 2, the cell continues growing and carrying out its normal functions. üThe cell also checks to make sure the duplicated DNA is undamaged. • During Mitosis, the cell begins dividing!

Chapter 5: Cell Growth and Division Section 1: The Cell Cycle Eukaryotic Cell Cycle (You. Tube link)

Chapter 5: Cell Growth and Division Section 2: Mitosis and Cytokinesis Next Up: MITOSIS!

Chapter 5: Cell Growth and Division Section 2: Mitosis and Cytokinesis 1. Hot dog fold 2. Hamburger fold 3. Lasagna fold 4. (hungry yet? ) 5. Cut lasagna creases to the middle fold 6. Fold over and label your book! s M si ito

Chapter 5: Cell Growth and Division Section 2: Mitosis and Cytokinesis Mitosis Animation (You. Tube link)

Chapter 5: Cell Growth and Division Mitosis Prophase M A T Section 2: Mitosis and Cytokinesis During Prophase: • Chromosomes condense • Nuclear membrane breaks down • Centrioles move to ends of the cell.

Chapter 5: Cell Growth and Division Mitosis P Where do Metaphase the spindle A fibers come T from? Section 2: Mitosis and Cytokinesis During Metaphase: • Spindle fibers attach to chromosomes • Chromosomes align at cell equator

Chapter 5: Cell Growth and Division Mitosis P M Anaphase T Section 2: Mitosis and Cytokinesis During Anaphase: • Chromatids separate and move to opposite sides of the cell.

Chapter 5: Cell Growth and Division Mitosis P M A Telophase Section 2: Mitosis and Cytokinesis During Telophase: • Nuclear membrane reforms • Chromosomes unpack • Spindle fibers fall apart

Chapter 5: Cell Growth and Division Mitosis P D M O A N T E! Section 2: Mitosis and Cytokinesis During Cytokinesis • Cell splits apart into genetically identical daughter cells

Chapter 5: Cell Growth and Division Section 2: Mitosis and Cytokinesis Mitosis in Real-Time (You. Tube link)

Chapter 5: Cell Growth and Division Section 2: Mitosis and Cytokinesis How the Cell Cycle Works (You. Tube link)