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Which type of tissue would have a higher mitotic index, normal tissue or cancerous tissue? Explain. -The normal stomach tissue has a lower mitotic index because it has a ratio of 20:2 cells that are diving and a cancerous stomach tissue has a ratio 19:5 cells dividing. The cancerous tissue would have a a higher mitotic index because a cancerous tissue doesn't have much control over dividing itself. 3. Different types of normal tissues in the human body have different mitotic indices.
B. Mitotic Index in the Onion Root Tip The mitotic index is defined as the proportion of cells that are in the process of dividing. The onion root tip is an area of active growth and, therefore, one would expect that mitosis is occurring at a rapid rate. What the mitotic index will do is to tell us how active this tissue is. Using a slide of the onion root tip, count 100 cells and indicate which stage of mitosis each of these cells are in. Enter your data in the following table. Table 1, Calculation of Mitotic Index Observer Interphase Prophase Metaphase Anaphase Telophase Total 1 2 3 4 5 6 7 8 9 10 Totals Mitotic index =