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  • anonymous
Cell Cycle Lab Safety Notes: • Always handle microscopes and glass slides carefully. • Wash your hands after handling the prepared specimens. Materials: o Compound light microscope o Glass microscope slide with prepared onion root tip specimen Purpose: • understand and identify the stages of the cell cycle and mitosis. • apply an analytical technique to estimate the relative length of each stage of the cell cycle. Procedure: Data and Observations: Create a data table containing a tally of the number of cells observed in each of the following stages: Stage Number of Cells in Part 1 Number of Cells in Part 2 Interphase 12 16 Prophase 11 10 Metaphase 4 7 Anaphase 10 16 Telophase 10 21 Cytokinesis 3 6 Record any observations about the cells you observed. Data Analysis: Calculate the percentage of the cell cycle spent in each stage. Number of cells in given stage ÷ total number of cells counted × 100 = % of the cell cycle spent in this stage Create a graph that represents the time spent in each stage of the cell cycle. Stage Time Spent in the 1st stage Time Spent in the 2nd stage Interphase 42.85% 57.14% Prophase 190.90% 210% Metaphase 275% 157.14% Anaphase 260% 162.5% Telophase 310% 147.61% Cytokinesis 300% 150% Conclusion: Be sure to answer the following reflection questions in the conclusion of your lab report: 1. Based on your data, what can you infer about the length of time spent in each stage of the cell cycle?

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