"Theme 1 STATION 2 mitosis"
STATION #2- A CLOSER LOOK AT CELL DIVISION: MITOSIS Your Name: ____________________________________ Group Members: ____________________________________ ____________________________________ ____________________________________ Curriculum Objectives: B2.1- use appropriate terminology related to human cells, tissues, organs and systems including: interphase, prophase, metaphase, anaphase, telophase B2.2 – examine cells under a microscope or similar instrument to identify the various stages of mitosis in animals Upon completion of this station, you should be able to: Name the 4 stages of mitosis and one major event in each stage Identify the 4 stages of mitosis in a microscope, diagram or microviewer Explain why mitosis is necessary Materials Required: 4 net books Station #2 package – one per student 4 microviewers and mitosis slides PLEASE NOTE: Do the assignments/tasks outlined in this station in the order instructed. Your teacher is available for assistance. The net books are to be used for research related to this station only. Record the definition of any terms that are italicized and bolded on your glossary page. Instructions Page Note: Follow the instructions outlined on this page in the order presented. Doing so will facilitate understanding of the material. Do not proceed to subsequent activities until all previous activities are completed. Part 1: A Closer Look at Cell Division: Mitosis Instructions: a) Log onto Ascension’s Website at: http://www.dpcdsb.org/ASCEN/Departments/Science.htm b) Click on SNC 2P and then open the power point: KS4 Cell Division and Fertilization c) Follow the presentation and answer the questions on the Worksheet titled “Part 1: A Closer Look at Cell Division: Mitosis”. Part 2: Mitosis: A Cut-and-Paste Activity Instructions: Find the “Mitosis: A Cut-and-Paste Activity” handout in your package. Cut out the diagrams of a cell in various stages of mitosis. Also, cut out the descriptions to accompany each picture. Match the description to the diagram and glue, in the correct order, the phases of mitosis on the answer sheet provided. Use the microviewers and the mitosis slides to help you identify the different stages. You may also return to the powerpoint slideshow if you get confused. Part 3: Exit Ticket Before you can complete this station you must complete the self evaluation and hand it in. Also make sure the laptops go back in the cart and your group has cleaned up. Part 1: A Closer Look at Cell Division: MITOSIS Read Instructions on Instruction Sheet before proceeding 1. INTERPHASE (not part of Mitosis): a. What happens to a cell during interphase? b. What happens to the DNA in a cell at the end of interphase? 2. Name the 4 phases of mitosis and come up with a saying that uses the first letters of each phase to help you remember the names and order of the phases. 3. PROPHASE: a. What happens to the loosely coiled DNA during this phase? b. What happens to the nuclear membrane? c. How many chromosomes do you see in the diagram (not the real image)? Are they in the replicated form (like the letter “X”? d. What do the centrioles do? 4. METAPHASE: a. Where do the spindle fibers attach? b. What happens to the chromosomes? 5. ANAPHASE: a. What happens to the chromosomes? Why? 6. TELOPHASE: a. What happens to the chromosomes? b. What happens to the spindle fibers? c. How many cells do you see? How do these cells compare to the original (parent) cell? d. How many chromosomes are in each cell? Are they in the replicated form (like the letter “X”) or unreplicated? e. What happens to the nuclear membrane? 7. In your own words, why is mitosis important? Narration of the Animation in the Powerpoint Presentation Note: Rewind the animation several times and reread the script to get a better understanding of what is happening. - start with a single cell - centrioles move to the ends of the cell - each DNA molecule (you can see 4 molecules) is copied and the identical copies are held together by a centromere - nuclear membrane disappears - each DNA molecule condenses (gets shorter and fatter). Now we call them chromosomes - spindle fibers extend from the centrioles and attach to the centromere of each chromosome - the chromosomes move to the middle of the cell - the chromosomes separate and move to the ends of the cell - 2 new cells form, each with its own nucleus and DNA Part 3: Mitosis: A Cut-and-Paste Activity – Answer Sheet Paste the diagrams and explanations of mitosis in the correct order. Diagram Phase Name and Description Mitosis: A Cut-and-Paste Activity (page 2) Match the descriptions below to the appropriate diagram on the previous page. Cut out both the diagrams and captions and glue them on your answer sheet in the correct order. Phase name: _______________ Phase name: ________________ Spindle fibers pull chromosomes Chromosomes line up in the apart. middle of the cell. Phase name: ______________ Phase name: ________________ Cell begins to pinch apart in the DNA condenses into chromosomes. middle. Nuclear membrane Nuclear membrane disappears. reforms. Phase name: ________________ 2 daughter cells form which are Cell is growing. DNA is copied identical to the parent cell SELF EVALUATION Name: ____________________________________ Rate each question using a number scale 1-4 (1: I have a poor understanding of the concepts, 2: I have some understanding of the concepts, 3: I have a good understanding of the concepts, 4: I have an excellent understanding of the concepts). 1. I am able to name the 4 main stages of mitosis in order. 1 2 3 4 2. I am able to state one thing that is happening in each phase 1 2 3 4 3. I can state 2 reasons why mitosis is important. 1 2 3 4 If you rated any of the above questions: 1 or 2, what did you do to try to help yourself have a better understanding of that concept? (Remember to state what concept you are having trouble with and what you did to help yourself) ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________________ ____________________________________________________________________________ What did you like about this activity? ______________________________________________________________________________ ________________________________________________________________________________ ____________________________________________________________________________ How could this station be improved on to better assist you in your learning? ______________________________________________________________________________ ________________________________________________________________________________ ____________________________________________________________________________