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Cell Division Gizmo-Exploring the Stages and Signi

Cells must grow during interphase to prepare for division, and DNA replicates so chromatids can separate to opposite poles, ensuring each daughter cell gets a full set of genetic information.

Alice Edwards
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g«l GizmosName:Date:IStudenlt Exploration: Cell DivisionDirections: Follow the instructions to go through the simulation. Respond to the questions andprompts in the orange boxes.Vocabulary: cell division, centriole, centromere, chromatid, chromatin, chromosome, cytokinesis. DNA,interphase, mitosisPrior Knowledge Questions (Do these BEFORE using the Gizmo.)1.Cells reproduce by splitting in half, a process calledcell division.What do cells need to do betweendivisions to make sure that they don't just get smaller and smaller?They reed to go through interphase to make sure there is enough proteins and mass tocontinue dividing2.The genetic information of a cell is carried in itsDNA(short for deoxyribonucleic acid). What do cells needto do between divisions to make sure that a full set of DNA gets passed on to each daughter cell?Chromatids need to each the opposite poles of the cellGizmo Warm-upOnthe SIMULATION pane of theCel! DivisionGizmo, check that the CycleLengthis set to 12 hours. Click Play {►), observe until themaximumnumber ofcells is shown, and then click Pause ( " ).1.Look at the cells. Do they all look the same?NO2.Cells that are in the process of dividing are said to bein mitosiscrcytokinesis. Cells that are net dividing are in interphaseCheck the Magnify box and move the cursor over the cells.A.Of the 100 cells shown, how many are in the process of dividing?9B.Select the BAR CHART tab, and turn on Shownumerical values.How many cells are in theinterphase stage of their life cycle?79C.Based on these two observations, would you say that a cell spends most of its life cycle ininterphase or in mitosis/cytokinesis?Interphase

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Biology

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