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AP Biology Mitosis Lab Introduction The purpose of this lab is to study the process of mitosis in onion root tip cells. This way you can see what each stage of mitosis looks like in a plant cell and then calculate the relative duration of the phases of mitosis in plant meristematic tissue. Roots consist of different regions. The root cap functions in protection. The apical meristem is the region that contains the highest percentage of cells undergoing mitosis. The region of elongation is the area in which growth occurs. The region of maturation is Where root hairs develop and where cells differentiate to become xylem, phloem, and other tissues (Figure 3.1) Figure 3.1a: Median Longitudinal Section —_‘ Figure 3.1b: Apical Meristem Tip Close Up specialization |<] i ‘ ti Exercise 3A.1 Examine prepared slides of onion root tips. Locate the meristematic region of the onion with the 10X objective, and then use the 40X objective to study individual cells. For convenience in discussion, biologists have described certain stages, or phases, of the continuous mitotic cell cycle. Identify one cell that clearly represents each phase. Sketch and label the cell in the boxes below. Table 3.1 Interphase Prophase Metaphase Anaphase Telophase 
