cell+division+ba

Cell Division (Chapter 18) 18.1 INCLUDE AN IMAGE THAT SHOWS THE CELL CYCLE http://nobelprize.org/nobel_prizes/medicine/laureates/2001/cellcycle_eng.jpg

1. What are the three stages of interphase. Describe each phase. G1 in which the DNA is prepared for replication,S in which senthisis occurs, G2 protiens prepare for division

2. How does interphase prepare a cell for cell division? gathers the protiens neccesary for cell division

3. Define: mitosis, sister chromatids, centromere, cytokinesis, apoptosis mitosis- nuclear cell division sister chromatid- enlarged pair of chromosomes centromere- location of chromatids cytokeneis- devision in cytoplasm apoptosis- the dying of a cell 18.2

INCLUDE LABELED IMAGES OF THE PHASES OF MITOSIS http://www.wadsworth.org/bms/SCBlinks/mcewen/Media/fig_1_cell_mitosis.jpg 4. Following mitosis, how does the chromosome number of the daughter cell compare with the chromosome number of the parent cell? the numbers are the same

5. What are the phases of mitosis and what happens during each phase? prophase- spindle fibers attach to the chromsomes metaphase- chromosomes gather in a straight line at the center of the cell anaphase- chromosomes seperate and move to opposite ends of the cell telophase- cytokenisis occurs

6. How is the cytoplasm divided between the daughter cells following mitosis? divided through cytokenisis

7. Define: parent cell, daughter cell, diploid, centrosome, mitotic spindle, centrioles. parent cell-dividing cells daughter cell- result of division diploid- number of complete number of chromosomes centrosome- organizing center in the cell miotic spindle- spindle fibers centrioles- micro tubules

8. What is the importance of mitosis and how is the process controlled? mitosis is necessary for new cells