Cell+Division+WB

18.1 INCLUDE AN IMAGE THAT SHOWS THE CELL CYCLE 1. What are the three stages of interphase. Describe each phase. 2. How does interphase prepare a cell for cell division? 3. Define: mitosis, sister chromatids, centromere, cytokinesis, apoptosis 18.2 INCLUDE LABELED IMAGES OF THE PHASES OF MITOSIS 4. Following mitosis, how does the chromosome number of the daughter cell compare with the chromosome number of the parent cell? 5. What are the phases of mitosis and what happens during each phase? 6. How is the cytoplasm divided between the daughter cells following mitosis? 7. Define: parent cell, daughter cell, diploid, centrosome, mitotic spindle, centrioles. 8. What is the importance of mitosis and how is the process controlled? 1. During the G1 stage, the cell doubles organelles and collects matter necessary for DNA synthesis. Both Histone and DNA are necessary for changing chromatin to chromosomes. During the S stage, DNA replication occurs in the form of two identical DNA molecules in the sister chromatids. During the G2 stage, the cell produces proteins necessary for cell division. 2. Interphase prepares cells for cell division by replicating DNA and accumulating proteins. 3. Mitosis is cell division in which the new cell contains identical chromosomes in comparison to the old cell. Sister Chromatids are DNA molecules. The Centromere is located in the center of the chromosome, and connects the sister chromatids. Cytokinesis is when the cytoplasm is divided into two daughter cells.

4. Following mitosis, the parent cell and daughter cell are 100% identical. 5. During early prophase, chromatin is moving into chromosomes. During prophase, the nucleolus breaks down, spindles appear, and duplicated chromosomes appear. During early metaphase, the chromati attach to the spindles, which are now completely formed. During metaphase, the centromeres of duplicated chromosomes are aligned, and sister chromatids are attached to spindle poles on the opposite side of the cell. During anaphase, sister chromatids separate an move towards the spindle poles on the opposite sides of the cell. During telophase, the nucleolus reappears and surrounds the new daughter cells. 6. The cytoplasm is divided between the daughter cells via cytokinesis. 7. The parent cell is the cell from which the daughter cells are formed. The daughter cell is an exact replica of the parent cell. The diploid is a cell consisting of two sets of chromosomes. The centrosome is the center of the cell. The miotic spindle is where spindle fibers are formed. The centriole is a barrel-shaped organelle. 8. The importance of mitosis is to continually replicate and produce more cells. Apoptosis keeps the body from creating an over abundance of cells.