mitosis lab...proteins. cellular division also involves the process of cytokinesis, in which the...
TRANSCRIPT
Mitosis LabFriday, February 3, 2017 8:27 PM
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This is because in mitosis, one of the main events is the splitting of the nucleus into two nuclei, beginning through the breakdown of the nuclear membrane during the first stage, prophase, and the rebuilding of two separate nuclei in the fourth and final stage, telophase. These nuclei protect the exact copy of the chromosome received from the parent's genetic information, thus completing the final step of the sorting and redistribution, because the DNA has been transported to its final location in each daughter cell, where is stays until the next cell division and gives instructions to the cell to make proteins. Cellular division also involves the process of cytokinesis, in which the entire cell, including the cytoplasm and other organelles splits into two for each daughter cell, and the process of mitosis, so it encompasses both processes.
The whitefish blastula immediately undergoes rapid division after egg fertilization from the start, thus allowing for a higher chance of an observation of all the phases of the cell cycle, which includes mitosis. The onion root tip, cell division occurs quickly at the apical meristems in the stem and root tips, meaning that mitosis can be viewed for the same reason. They both can be stained to obtain a clear view of the chromosomes.
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Most of the cells in the onion root tip were in prophase during our observation, meaning that we had found a plant where most of the parts had finished moving through interphase, which usually takes the longest, thus allowing us to observe this phase of mitosis for longer. Prophase was most common while we were watching the cell cycle, with interphase coming after in percentage.
It would have been difficult to find a cell that was dividing, so it would have slowed down the experiment, and even if there were some, it is most likely that they would be in interphase, so results about the process of mitosis could not have been obtained so easily.
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