03.01 Cell Division

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Christian Brothers University *

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MISC

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Biology

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Jan 9, 2024

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Uploaded by JusticeUniverseCrocodile18

Virtual Cell Cycle Lab Activity Instructions: The Virtual Cell Cycle Lab is on the lesson assessment page. On the image, it says “Click Anywhere to Start”. Follow the instructions as you move through the lab. The lab activity will keep count of your data on the right and you can record this into the data table at the end of each trial. Title: Virtual cell cycle lab activity.  Objective(s): Understanding and identifying the stages of the cell cycle and mitosis.  Applying an analytical technique to estimate the relative length of each stage of the cell cycle. Hypothesis: I predict that there will be around the same number of cells in each phase. Data: Record the number of cells you observed in each part of the lab activity. Number of Cells in Part 1 Number of Cells in Part 2 Interphase 34 49 Prophase 8 13 Metaphase 3 4 Anaphase 2 3 Telophase 2 4 Cytokinesis 1 3 Observations: Record any observations about the cells you observed. What does the cell look like for each stage? What is a distinguishing visible feature of each stage of the cell cycle? Description of cell Interphase The cell has a solid line forming the circle. The inside of the cell is scattered with curved lines.

Prophase The cell's outside is dotted, while the inside looks like a bunch of scattered Xs. Metaphase The cell's outside is solid and the inside has a vertical line of Xs. Anaphase The cell's outside is solid and the inside has a vertical line of Xs. Telophase The two cells are connected by lines, with what looks like Vs on opposite sides. Cytokinesis The two cells are connected by lines, with what looks like Vs on opposite sides. Part 1 Using your percentages in part 1 please create that represents the time spent in each stage of the cell cycle. Insert Chart [Hint: don’t forget to consider the relationship between your data and the type of chart to best represent your data] Interphase: 147.05% Prophase: 625% Metaphase: 1666.67% Anaphase: 2500% Telophase: 2500% Cytokinesis: 5000% Part 2 Interphase: 155.10% Prophase:584.06% Metaphase:1900% Anaphase:2533.33% Telophase:1900% Cytokinesis:2533.33%

Conclusion: Be sure to answer the following reflection questions as a summary in the conclusion of your lab report:  Was your hypothesis correct? Why or why not?  Based on your data, what can you infer about the length of time spent in each stage of the cell cycle?  What stages were the longest and shortest? Give a brief explanation of why these stages may have that time period. Interphase took a long time, while Anaphase and Telophase took about the same time. Out of all the phases, the longest was Interphase and the shortest was Anaphase. Interphase is the phase when the cell is growing and developing therefore, it took the longest time. I think that because Anaphase has paired chromosomes, it moves faster. Chromosomes are visible only in the nucleus of dividing cells and not in non-dividing. I believe that if we had more to observe, we would see that the speed of each phase probably would have been a lot different.

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