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Module 2 Lab 1 Cell Reproduction.docx - BIOS 1010 General...

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BIOS 1010 General BiologyModule 2 Lab 1Cell ReproductionMaintaining the appropriate number of chromosomes requires special processes during celldivision. We know these special processes asmitosisfor production of body cells andmeiosisforproduction of sex cells in animals and spores in plants.MaterialsPipe cleaners, beads, or other appropriate materials for making chromosomes.Part 1.Visualization of MitosisYou will look at images of cells in an onion root tip to observe the process of mitosis.Procedure1.Go to the University of Arizona’s Biology Project website’s cell cycle page at2.Read each page and click “next” when you are done with each page – you will read aboutthe basics of DNA, as well as the cell cycle. Remember, animal cells go through the cellcycle and mitosis too, even though the tutorial is devoted to onion cells.3.When you get to the page The Cell Cycle and Mitosis Tutorial, read each description andlook at each cell photo carefully – then click “next.”4.On the “Test Yourself” page, click “Problem 1.” After answering that question, write thecorrect answer on the worksheet, then click “Next.”5.Continue answering the questions, writing the correct response on the worksheet, andclicking the next problem number after each answer. When you are finished with all 11questions, click “The End.”6.Before continuing with the Biology Project website, answer question 12 and makesketches of each stage of mitosis in the onion root tip table under Part 1 on the worksheet.Pictures of the stages of mitosis in an onion root tip are available for reference in the CellReproduction Online Lab PowerPoint.7.On the web page that appears, click the hyperlink to Online Onion Root Tips.1
8.Carefully study each page, clicking “Next” to move on.9.On the next page, there is a blank table for determining the length of time necessary foreach portion of the cell cycle. You do not need to copy this table, as a similar one can befound on the worksheet. Identify each of the cells’ stage of the cell cycle (interphase orone of the 4 mitotic phases). When you have identified all 36 cells, fill in the table on theworksheet. To calculate the length of time an onion cell might spend in each of these

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Term
Fall
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Tags
Cell Cycle, Mitosis, Cell reproduction

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