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Class Topics

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  1. Hand in the Mitosis lab and “The Role of Chromosomes” before the bell rings Review for Chapter 6 Quiz 2 Lab – How long is each phase of mitosis? Begin Chapter 7 It is not enough to have a good mind; the main thing is to use it well. Rene Descartes To continue learning about Chapter 6 Title: Biology 1/8/07 Class Topics Objectives: Monday, October 21, 20194:40 AM

  2. Class Assignments What By When • W.S. “The Role of Chromosomes” 1/8/07 • Mitosis Lab 1/8/07 • Lab – How long is each phase of mitosis? 1/10/07 • Chapter 6 Quiz 2 1/10/07 • Due this class period • Due next class period • Due in the future

  3. Emergency Procedures • Fire • Out door to right, down stairs, outside in parking lot - Stay as a group • Tornado • Out door to right, down stairs and to the right, kneel facing the lockers in the brown hallway - Stay as a group • “Secure the Building” • Stay in your seat and be quiet - some students may have to move to a lab table • Evacuation • Travel as a class to south doors and move down sidewalk to load busses

  4. Grade Sheet

  5. Chapter 6 Mitosis Quiz Review • Chromosomes • Chromatids • Diploid cell • Cell Cycle and Cancer • Interphase • G1 • S • Sequence • Checkpoints/cyclins • Cancer

  6. Chapter 6 Mitosis Quiz Review • Mitosis (general) • Definition • When completed • Mitosis (specific) • Order • Prophase • Spindle fiber • Metaphase • Anaphase • Cytokinesis • When? • Plant cell • Animal cell • Label – pictures of mitosis

  7. How long is each phase of mitosis? • View a section of onion root tip • Count the following • Cells in interphase, prophase, metaphase, anaphase, telophase • Choose a good section • Repeat twice more

  8. Meiosis • Process of cell division - chromosome number is halved • From 2n to n • Formation of gametes • Starts after G1, S, G2 • Chromosomes have been replicated • Sister chromatids (4 arms) • Two divisions • Meiosis I, Meiosis II