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Mitosis and Meiosis by Majka Tillis

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S: Mitosis

FC: Mitosis's and Meiosis's PMAT Majka Tillis

1: Mitosis and Meiosis PMAT Majka Tillis

2: Interphase

3: Interphase is the phase before Mitosis starts. It is the longest phase in the cell cycle and is the period between cell divisions. In it the cell doubles size, which is called G1. The cell has to double in size so hen it can be seperated to make a new cell. Then the DNA is copied into the cells, which is S. The cell has to copy the DNA so it will be an exact copy and it does the same job. Lastly, the organelles are copied, which is G2. The organelles are copied so the cell can do it's job with the right parts.

4: Prophase

5: Prophase is the first, and longest, stage in Mitosis. In this stage, there are centromir, centrioles, spindle fibers, and daughter centromere. The centromir and daughter centromere's make up a chromosome. In this stage the chromosomes coil up and attach to the spindle fibers. The centrioles go to the poles dring this stage. Close to the end, the nucleous disappears.

6: Metaphase

7: Metaphase is the shortest phase in mitosis. In this phase, the chromosomes line up at the middle and centromeres attach to the spindle fibers.

8: Anaphase

9: Anaphase is after Metaphase. In Anaphase, the centromeres split and the chromosomes slipt apart and moves to the poles.

10: Telophase

11: Telophase is the last stage in mitosis before it repeats itself. In this stage, the chromosomes begin to uncoil back into chromatins. Cytokinesis also happens, which is the division on the cytoplasm. The cell copy is complete and now there are 2 new identical diploid cells.

12: Cytokinesis

13: Cytokinesis is the end result of mitosis and it is the division of cytoplasm. It makes two new cells that are genetically identical.

14: Meiosis

15: Meiosis produces egg cells and sperm cells. Both are considered gametes which are cells used for reproduction. When the egg cells and sperm cells are alone they are haploids. Haploids are cells with only 1 set of chromosomes. When they are together, they are diploids. Diploids are cells with pairs of chromosomes. Which, also, make up homologous chromosomes. Meiosis has 2 rounds of cell division, meiosis I and meiosis II.

16: Mitosis vs. Meiosis

17: In Mitosis, there is only 1 round of cell division. The cells that are made are, somatic cells (body cells), which 2 are made in this process. Mitosis starts out with the number of chromosomes and then doubles it. Then it divides itself in half. If the number it ends with is the same number it began with, it is Mitosis. | In Meiosis, there is 2 rounds of cell division, meiosis I and meiosis II. Meiosis makes up sex cells, which are egg cells and sperm cells (also called gametes). Alone, sperm cells and egg cells are haploids, but together they are diploids. In this process, 4 sperm cells are formed and 1 egg cell is formed. How this happened is in it, the number of sperm cells you start off with is doubled. Then it is divided into 2 new cells, meiosis I, and then those are divided into 4 new cells. Which is carried off to be the end result. For the egg cells, it's the same process, the only difference is meiosis II keeps 3 of the egg cells as Polar Bodies and gives off 1 for the end result.

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  • Title: Mitosis and Meiosis by Majka Tillis
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  • Started: over 7 years ago
  • Updated: over 7 years ago