CELL CYCLE PRESENTED BY: REBECCA BALKCOM I N T R O D U C T I O N TO M I TO S I S STANDARDS • Next Generation Science Standards: – Scientific & Engineering Practices • Developing and using models • Analyzing and interpreting data • Obtaining, evaluating, and communicating information – Crosscutting Concepts • Patterns – Disciplinary Core Ideas • Life Sciences – LS 3: Heredity: Inheritance and variation of traits • Current ALCOS: #6 Define the roles of mitotic & meiotic divisions during reproduction, growth and repair of cells. • Proposed new ALCOS: #4 Develop and use models to explain the role of mitotic cellular division in the growth and repair of cells within multicellular organisms. CELL CYCLE LAB ROTATION • This lab is designed to introduce students to mitosis. – Introduces students to terminology used with cell reproduction. (chromosomes, chromatids, chromatin, centrioles and spindles fibers) – Identify each stage of the cell cycle using drawings and real microscope images. – Calculate the amount of time the cell spends in each phase. • Sample Daily Notes • Mitosis is a form of cell reproduction where the cell goes through a nuclear division to produce 2 identical diploid cells (2n). 2n2n. This occurs in your somatic cells or body cells. It makes exact copies. STATION 1 - LOOK AT THE CHART AND DESCRIBE WHAT IS HAPPENING IN EACH PICTURE. A G Letter Description A B B C F D E F C E D STATION 2 – SORT OUT THE FOLLOWING IMAGES INTO THE FOLLOWING CATEGORIES: INTERPHASE, PROPHASE, METAPHASE, ANAPHASE,TELOPHASE AND CYTOKINESIS. Phase Interphase Prophase Metaphase Anaphase Telophase Cytokinesis # of Pictures STATION 3 – IDENTIFY THE PARTS OF THE CELL THAT ARE LABELED IN THE PICTURE: STATION 4 – IDENTIFY THE STAGES PRESENT IN THIS IMAGE. STATION 5 – SORT THE PARTS BELOW INTO GROUPS USING THE LABELS PROVIDED AND GIVE A COUNT ON YOUR LAB REPORT. Cell Part Chromatid Chromosomes Centrioles Spindle Fibers Chromatin # of Pictures STATION 6 – DETERMINE THE PERCENTAGE OF TIME EACH CELL WILL SPEND IN EACH STAGE OF MITOSIS. DIVIDE THE NUMBER OF EACH CELL BY THE TOTAL NUMBER OF CELLS AND MULTIPLY BY 100 TO DETERMINE THE PERCENTAGE. PLACE THESE VALUES IN THE CHART BELOW. *Students can make a bar or pie chart to present the data STATION 7 – PUT THESE IMAGES IN THE ORDER IN WHICH THEY OCCUR. RECORD THE INFORMATION ON YOUR LAB SHEET USING THE TABLE BELOW. Group Order of Pictures 1 2 3 4 ANALYSIS QUESTIONS 1. How did you determine between chromosomes, chromatids and chromatins? 2. In which two phases are chromosomes present? 3. Which phase of the cell cycle do your cells spend the most time? 4. What patterns or trends did you notice that occurred during the cell cycle? 5. How is interphase and cytokinesis similar and different?