The Cell Cycle and Mitosis
By: Siri Ott and Kira Matthias
Three Reasons Why Mitosis Happens
It happens when damage needs to be reapaired, like if you fall and scrape your knee, mitosis helps the wound heal and scab. Another reason why mitosis happens is when cells in your body die, they need to be replaced. Lastly, your body needs to grow and develop and mitosis helps it do that.
In interphase, cells grow, preform their assigned tasks, and make DNA. Cells are in interphase about 90% of the time. Centrioles are a part of cells that move to the outskirts of the cell to get ready for the process of mitosis. They also connect to the chromosomes, which are in the nucleus. This will come on later in the mitosis process. This is the process that prepares cells for mitosis.
Mitosis is the process of dividing DNA and generating new cells. Cells are in this process 10% of the time.
Metaphase is the second step of mitosis. In metaphase, paired chromosomes align in the center of the cell. Spindle fibers start to separate the chromosomes, by connecting to the centromere. Also during this process, the centrioles spin away from the chromosomes, the allow the spindle fibers to move.
Cytokinesis is the process of cell division. In cell division, one cell becomes two cells, and the cytoplasm completely divides to create two nuclei. Chromosomes also start to disappear, and centrioles come together at the top of the cell. Cytokinesis needs the process of mitosis and meiosis.