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Name (s): Mitosis -- Internet Lesson Make sure all of your answers are in orange font before sending to the homework folder. http://www.cellsalive.com/ On the left side of the screen is a navigation bar, click on the link to “MITOSIS” Read the text on this page and view the animation, you can slow down the video by clicking step by step through the phases. 1. List the 6 stages of mitosis that we have covered in class. The Internet lists one extra step that we didn’t cover. A. B. C. D. E. F. 2. During which stage does the following occur? Chromatin condenses into chromosomes. Chromosomes align in center of cell. Longest part of the cell cycle. Nuclear envelope breaks down. Cell is cleaved into two new daughter cells. Daughter chromosomes arrive at the poles. Watch the video carefully by clicking on the play button. 3. The colored chromosomes represent the chromatids joined by the centromere. There are two of each color because one is an exact duplicate of the other. A. How many chromosomes are visible at the beginning of prophase? B. How many chromosomes are visible in each daughter cell at the end of mitosis (cytokinesis)? The little green T shaped things on the cell are centrioles. C. What happens to the centrioles during mitosis? 4. Identify the stages of these cells: A. B. A. B. C. D. C. D. Onion Root Tip - Online Activity http://www.biology.arizona.edu/cell_bio/activities/cell_cycle/cell_ cycle.html Read the introduction, then click the “next” button. You will have 36 cells to classify. When you’re finished, record your data in the chart below. Interphase Prophase Metaphase Anaphase Telophase Total Number of cells 36 Percent of cells 100 % (Take the number of cells and divide by 36).