Cell division

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Why are spindle fibers important for mitosis? (5 points)
State the four bases that make up DNA. (4 points)
What are the two base pairings within DNA? (2 points)
Answer the following questions:
Define the term crossing over. (2 points)
Explain why crossing over is important in meiosis. (3 points)
What are the two main differences between mitosis and meiosis? (4 points)
Answer the following questions:
Explain the difference between mitosis and cytokinesis. (4 points)
During which phase of the cell cycle does mitosis occur? (2 points)
During which phase of the cell cycle does DNA replication occur? (2 points)
Explain the differences that occur during cytokinesis in plant and in animal cells. (5 points)
Refer to the images below, labeled A through E. One image details the cell in interphase of the cell cycle, while the remaining four images depict the four stages of mitosis. Report which cell depicts interphase and each stage of mitosis. (5 points)
A

B

C

D

E

Interphase
Prophase
Metaphase
Anaphase
Telophase/cytokinesis
Refer to the image below. What stage of mitosis is the cell identified below undergoing? (5 points)
Refer to the images below. Place the cells identified with the letters A through E in correct order for a cell undergoing mitosis. (5 points)
Interphase
Prophase
Metaphase
Anaphase
Telophase/cytokinesis
Which phase of cell division is shown in the center cell of the image below? (5 points)
What three components make up the structure of DNA? (3 points)
Describe the differences between chromatin, chromosomes and sister chromatids. (3 points)
Refer to the images to identify cytokinesis either by the process of a cleavage furrow or cell plate. (3 points)

Which stage of meiosis is shown in the image below? (5 points)
What are haploid cells, and what are diploid cells? Provide an example of each cell type in the human body. (6 points)
Why is it important that haploid gametes be produced in animals? (5 points)
During which stage of meiosis do homologous chromosomes separate? (2 points)

Sample Solution

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