Compare And Contrast Mitosis And Meiosis
Mitosis and meiosis are both important biological processes that happen within eukaryotic cells. These two processes are slightly different from one another, but have a lot of similarities. Before each of these processes can be performed, the cell first has to go through interphase. Interphase is considered the primer for mitosis or meiosis and consists of: G1, S, and G2 phases. These phases prepare the cell for either mitosis or meiosis by causing the cell to grow, copy the DNA, and copy the cell’s organelles.
Mitosis is the formation of body cells using existing cells. Once interphase is completed, the cell begins mitosis by entering karykinesis. This is the first of the two phases in Mitosis. Karyokinesis consists of four stages: Prophase, …show more content…
Meiosis also consists of two phases: karyokinesis and cytokinesis. Unlike mitosis, meiosis consists of two cell divisions: meiosis I and meiosis II. Both meiosis I and meiosis II involve karyokinesis and cytokinesis. Once interphase is completed, the cell begins meiosis I with prophase I. In prophase I, chromosomes condense, the spindle-fibers form, the nuclear envelope begins to break down, and homologous chromosomes pair. During metaphase I, the spindle-fibers line the homologous chromosome pairs in the middle of the cell. Anaphase begins and pulls the homologous pairs toward the spindle fibers on either side of the cell. Meiosis I ends with telophase I, when the homologous chromosome pairs finish moving to opposite sides of the cell. After meiosis I is complete, cytokinesis divides the cytoplasm and produces two haploid daughter cells. Now, meiosis II begins in both of the daughter cells that were produced in meiosis I. In prophase II, if a nuclear membrane formed it is broken down and the spindle-fibers attach to the centromeres on the chromosomes. Then in metaphase II the spindle-fibers line the chromatids up the middle of the cell. In anaphase, the spindle-fibers pull the chromosomes apart and telophase begins. In this stage, the chromosomes in both daughter cells form two separate nuclei and form a nuclear envelop each haploid set of chromosomes. During telophase, the cell membrane also begins to pinch separating into different cells. Cytokinesis separate the cytoplasm and fully separates the cells. Producing four, genetically different, haploid daughter
Mitosis is the formation of body cells using existing cells. Once interphase is completed, the cell begins mitosis by entering karykinesis. This is the first of the two phases in Mitosis. Karyokinesis consists of four stages: Prophase, …show more content…
Meiosis also consists of two phases: karyokinesis and cytokinesis. Unlike mitosis, meiosis consists of two cell divisions: meiosis I and meiosis II. Both meiosis I and meiosis II involve karyokinesis and cytokinesis. Once interphase is completed, the cell begins meiosis I with prophase I. In prophase I, chromosomes condense, the spindle-fibers form, the nuclear envelope begins to break down, and homologous chromosomes pair. During metaphase I, the spindle-fibers line the homologous chromosome pairs in the middle of the cell. Anaphase begins and pulls the homologous pairs toward the spindle fibers on either side of the cell. Meiosis I ends with telophase I, when the homologous chromosome pairs finish moving to opposite sides of the cell. After meiosis I is complete, cytokinesis divides the cytoplasm and produces two haploid daughter cells. Now, meiosis II begins in both of the daughter cells that were produced in meiosis I. In prophase II, if a nuclear membrane formed it is broken down and the spindle-fibers attach to the centromeres on the chromosomes. Then in metaphase II the spindle-fibers line the chromatids up the middle of the cell. In anaphase, the spindle-fibers pull the chromosomes apart and telophase begins. In this stage, the chromosomes in both daughter cells form two separate nuclei and form a nuclear envelop each haploid set of chromosomes. During telophase, the cell membrane also begins to pinch separating into different cells. Cytokinesis separate the cytoplasm and fully separates the cells. Producing four, genetically different, haploid daughter