Cell Division homework DB

18.1
INCLUDE AN IMAGE THAT SHOWS THE CELL CYCLE
1. What are the three stages of interphase. Describe each phase.
G1- the cell doubles organelles and accumulates materials for DNA
synthesis
S- DNA is replicated
G2- cell makes proteins needed for cell division

2. How does interphase prepare a cell for cell division?
The cell's DNA is copied.

3. Define: mitosis, sister chromatids, centromere, cytokinesis, apoptosis
Mitosis- The duplicating and division process that assures all cells have
the diploid number and the same kind of cell that divides.

cell_cycle.jpg

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?
The daughter cell has 23 chromosomes. The parent also has 36.

5. What are the phases of mitosis and what happens during each phase?
Prophase- crhomosome attach to spindle fibers
Metaphase- chromosomes align at equator
Anaphase- chromatids separate and move toward poles

6. How is the cytoplasm divided between the daughter cells following mitosis?
This split occurs in cytokinesis when the cytoplasm divides.

7. Define: parent cell, daughter cell, diploid, centrosome, mitotic spindle, centrioles.
Parent cell- original cell that divides
Daughter cell- the new cell
Diploid- the complete number of chromosomes
Centrosome- microtubule organizing part of the cell
Mitotic spindle- poles formed by the centrosome
Centrioles- short cylinders of microtubules in centrosomes

8. What is the importance of mitosis and how is the process controlled?
Mitosis is the process in which new body cells are made. It is controlled
by hormones and different checkpoints.


mitosis.jpg