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S: Mitosis & Meiosis

FC: Mitosis & Meiosis By: Abbie Gregg

1: Mitosis & Meiosis By:Abbie Gregg

2: Interphase Interphase is a stage that occurs before mitosis actually begins, therefore it is not apart of mitosis. In Interphase, there are 3 stages. G1: The cell doubles in size. S: DNA is replicated. G2: Organelles are replicated. | The parts that are still apart of the cell at this time are the nucleolus, plasma membrane, nucleus, and cytoplasm. The nuclear membrane will disappear in the next stage of mitosis. Also the nucleolus will disappear. The cytoplasm will divide in the last stage of the cell cycle. The DNA of the cell is also apart of interphase, because it is replicated. The organelles are also replicated.

4: In the middle of the chromosome there's a structure called the centromere that holds the sister chromatids together. Next the centrioles take their place at the poles of the cell. Chromosomes then attach to the spindle fibers. Then at the end the nuclear membrane disappears. | Prophase After interphase, the cell enters mitosis. This is the first stage of mitosis. It is also the longest phase of mitosis. When prophase starts, the chromosomes coil up. In this stage of the cell cycle the chromosomes are shaped like the letter X. There are separate parts of the chromosome called the sister chromatid.

6: Metaphase comes after prophase, and this is the shortest stage. during mitosis During metaphase the sister chromatids are pulled toward the equator (the middle of the cell) and they line up at the equator. The centromeres attatch to the spindle fibers keeping the chromosomes in place. | Metaphase

7: The centrioles stay at their opposite poles.

8: In anaphase, the centromeres split, and the chromatids split. When the chromatids split, they move to opposite poles. The centromere and the chromatids split because of the shortening of the spindle fibers. The centrioles are still at their opposite poles. | Anaphase

10: Telophase

11: During telophase, the chromosomes reach the poles of the cell, and they then de-condense into the relaxed form of DNA; chromatin. Since the centromeres split during anaphase, it also means that they are split here as the chromosomes are split also. The centrioles still remain at their opposite poles. The nuclear membrance re-forms during this phase.

12: Cytokinesis

13: Cytokinesis is the division of cytoplasm. It is apart of telophase. The cells aren't yet split in telophase and this is where cytokinesis comes in. In animal cells, microfilaments are used to pinch the cytoplasm, creating a furrow which pinches the cells apart eventually.

14: Meiosis

15: Meiosis consists of two divisions. Meiosis I, and meiosis II are these divisions. Meiosis is the production of gamete cells.

16: Mitosis vs. Meiosis | Mitosis goes through 1 round of division. It create two identical daughter cells which have 46 chromosomes. The chromosome number stays at 46 throughout the whole cycle of mitosis.The cells formed are somatic cells. Two cells are formed through the process of mitosis. Mitosis produced diploid cells, which have 2 copies of each chromosome. Meiosis goes through 2 rounds of division. The chromosome number is decreased during this stage of the cell cycle because meiosis deals with the reproductive cells. The reproductive cells have 23 chromosomes. Reproductive cells are formed during meiosis and 4 of them are formed. Reproductive cells are haploid.

17: Mitosis | Meiosis

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