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Copy of Cell Division Student Exploration Sheet
Anatomy & Physiology (BIOL 2113)
Gwinnett Technical College
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Name: Date: Student Exploration: Cell Division Vocabulary: cell division, centriole, centromere, chromatid, chromatin, chromosome, cytokinesis, DNA, interphase, mitosis Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. Cells reproduce splitting in half, a process called cell division. What do cells need to do between divisions to make sure that they just get smaller and smaller? need to 2. The genetic information of a cell is carried in its DNA (short for deoxyribonucleic acid). What do cells need to do between divisions to make sure that a full set of DNA gets passed on to each daughter cell? DNA has tot be copied so there is a full set of DNA to pass on to each daughter Gizmo On the SIMULATION pane of the Cell Division check that the Cycle Length is set to 12 hours. Click Play ( ), observe until the maximum number of cells is shown, and then click Pause ( ). 1. Look at the cells. Do they all look the same? 2. Cells that are in the process of dividing are said to be in mitosis or cytokinesis. Cells that are not dividing are in interphase. Check the Magnify box and move the cursor over the cells. A. Of the 100 cells shown, how many are in the process of dividing? B. Select the BAR CHART tab, and turn on Show numerical values. How many cells are in the interphase stage of their life cycle? C. Based on these two observations, would you say that a cell spends most of its life cycle in interphase or in Cytokinesis (Activity A continued on next page) The cell membrane pinches and divides the cell into two daughter cells Activity A (continued from previous page) 3. Analyze: Use your summaries and the Gizmo to answer the following questions: A. What are the four phases of mitosis? B. During which phase is the DNA duplicated? C. What is the relationship between chromatin and chromosomes? is a substance within a chromosome consisting of DNA and D. In which phase are chromatids pulled apart? E. What is the role of the centrioles? have spindle fibers around them and they help to determine the location of the F. In which phase does a new nuclear membrane develop? G. A cell has a single line of chromosomes. What is the phase? H. During which three phases are individual chromosomes no longer visible? 4. Think and design: One error in mitosis (and meiosis) is called nondisjunction, and cells end up with the wrong number of chromosomes. How would you determine what phase this would occur and how? think 5. Challenge: Human cells have 46 chromosomes. Each chromosome consists of a pair of identical chromatids attached together a structure called a centromere. Once the
Copy of Cell Division Student Exploration Sheet
Course: Anatomy & Physiology (BIOL 2113)
University: Gwinnett Technical College
