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10-2 Cell Division
Question | Answer |
---|---|
What are the two main stages of cell division in eukaryotes? | Mitosis and Cytokinesis |
In eukaryotic cells, how is genetic information passed on from generation to generation? | Chromosomes carry DNA so cell's know how to perform. |
True or False: The amount of chromosomes that are in an organism determine how complex it is. | False, the number of chromosomes has nothing to do with how complex an organism is, but is based on the type of species. |
How many chromosomes do humans have? | 46 chromosomes |
What is the "in-between" period of growth when a cell is not dividing? | Interphase |
What does the S phase stand for in interphase? | It is the period of activity where chromosomes are replicated and the synthesis of DNA molecules take place. |
True or False: Metaphase is the first and longest phase of mitosis. | False, Prophase is the first and longest phase of mitosis. |
If mitosis is the division of the cell nucleus, how is the final split of the cell completed? | Cytokinesis is the division of the cytoplasm. It physically splits the rest of the cell, making what was once one cell into two cells. |
Name the four phases of mitosis. | Prophase, metaphase, anaphase, and telophase. |
Explain why cells can't just simply divide. | Cells must first copy genetic info. before the split. This gives each daughter cell a complete copy of DNA. |
What is a spindle? What is it's job? | A spindle is a fanlike microtubule structure that helps separate the chromosomes. |
True or False: Centrioles are located in only plants. | True |
Describe why chromosomes look like an "x." | Strands of DNA and protein molecules bind together, forming what appears to be an "x" structure. |
Name three main jobs of the cell cycle. | During this cycle, cells grow, prepare for division, and divide to form two daughter cells. |
Prophase takes how much total time required to complete mitosis? | Up to 50 to 60 percent. |