Build a pair of replicated, homologous chromosomes. Sister chromatids begin coiling into chromosomes during prophase. DNA exists as loose molecular strands called chromatin it has not condensed to form chromosomes yet. Genetic content is replicated during interphase.
MaterialsĢ Sets of Different Colored Pop-it® Beads (32 of each – these may be any color) (8) 5-Holed Pop-it® Beads (used as centromeres) In this experiment, you will follow the movement of the chromosomes through mitosis to create somatic daughter cells. Discuss one observation that you found interesting while looking at the onion root tip cells.Įxperiment 2: Tracking Chromosomal DNA Movement through MitosisĪlthough mitosis and meiosis share similarities, they are different processes and create very different results. How accurate were your time predication for each stage of the cell cycle?Ĩ. What would happen if mitosis were uncontrolled?ħ. What is the function of mitosis in a cell that is about to divide?Ħ. How does this ratio change with respect to cell division?ĥ. As a cell grows, what happens to its surface area to volume ratio? (Hint: Think of a balloon being blown up). Were there any stages of the cell cycle that you did not observe? How can you explain this using evidence from the cell cycle?Ĥ. In what stage were most of the onion root tip cells? Based on what you know about cell cycle division, what does this imply about the life span of a cell?ģ. Label the arrows in the slide image below with the appropriate stage of the cell cycle.Ģ. Draw the dividing cell in the appropriate area for each stage of the cell cycle, exactly as it appears. Locate a good example of a cell in each of the following stages: interphase, prophase, metaphase, anaphase, and telophase.ģ. Observe the images of the root cap tip.Ģ. Part 2: Identifying Stages of the Cell Cycleġ. Calculate the time spent by a cell in each stage based on the 24 hour cycle: Hours of Stage = Record the image you selected and your counts in Table 2.ģ. Then count the total number of cells in the image. Pick one of the images, and count the number of cells in each stage. There are four images, each displaying a different field of view. Examine the onion root tip slide images on the following pages. Record your predictions, along with supporting evidence, in Table 1.Ģ. Predict how many hours of the 24 hour cell cycle you think each step takes. The length of the cell cycle in the onion root tip is about 24 hours. Part 1: Calculating Time Spent in Each Cell Cycle Phaseġ.
Onion ( allium) Root Tip Digital Slide Images Using this information and the data from your experiment, you can estimate the percentage of cells in each stage of the cell cycle. Remember that mitosis only occupies one to two hours while interphase can take anywhere from 18 – 24 hours. In this experiment, we will look at the different stage of mitosis in an onion cell. Investigate two known causes for these rapidly dividing cells and use this knowledge to invent a drug that would inhibit the growth of cancer cells.Įxperiment 1: Observation of Mitosis in a Plant Cell Cancer is a disease related to uncontrolled cell division. Identify at least one difference, and explain why it is significant.ģ. Research the differences that exist between mitosis and binary fission. Take the first step to getting top dollar for your used cell phone.2. Simply put, you’re going to get the best possible price for your old phone! When you sell used cell phones online to The Whiz Cells, you not only experience our blazing fast transaction process, but we also offer some of the very best prices. Keep in mind that it may take 7-10 days when receiving payment by check. We can send your payment via Paypal, Venmo, or personal check. Select the Payment Method That Works Best for You We guarantee we’ll issue payment within 24 hours from the time we receive your old phone, and often on the very same day! Want an even faster way to sell your used cell phones online? Then you’ll definitely want to take advantage of our Stupid Fast Payment option! Rather than waiting for us to send packaging to you, simply use your own packaging instead. Stupid Fast Payment: The Smart Way to Sell Used Cell Phones Online And the packaging and shipping are absolutely free! If your phone matches the description you’ve provided, you’ll typically receive payment within 72 hours from the time we receive it. We’ll even email a shipping label and send packaging to you right away. Just locate your old phone, login to your The Whiz Cells account, answer a few questions about your device and receive an immediate cash offer. You can easily sell cellphones online to The Whiz Cells.