Mitosis and Meiosis by Shyenne

For the past week and a half my Advanced Biology class has been studying mitosis and meiosis. We have learned everything from the first phase to the last phase. Mitosis and mitosis are closely alike the only difference between them is that meiosis is in two stages and creates four different daughter cells. During mitosis DNA is replicated, then the chromosomes line up in the middle of the cell. When this happens if not done right a mutation could occur. The chromosomes cross over and spindle fibers form, then the spindle fibers start to pull the chromosomes to opposite ends of the poles. Then after this happens they start to form two separate daughter cells. This process is the same as the first stage of mitosis but instead of forming two different cells the process starts over but this time the DNA does not replicate. Why does the DNA not replicate? What I have learned is that in these two different cell splitting is that meiosis creates gametes or reproductive cells in the male and female reproductive organs. Also while doing this we did a lab where we got to look at different cells undergoing mitosis. We looked at frog cleavage, lily ovary, and pollen just looking at where the most cell division occurs.