Download 10-2 - BellevilleBiology.com

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Class
Date
Cell Cycle
Cell growth and division occur in a regular cycle. This cycle is
divided into four phases: G1, S, G2, and M. The diagram shows
this cycle, along with events that occur in each phase.
Follow the prompts below.
• Color the phase in which most cell growth occurs blue.
• Color the phase in which DNA replication occurs red.
• Color the phase in which preparation for mitosis
occurs yellow.
• Color the phase in which mitosis and cytokinesis
occur orange.
Use the diagram to answer the questions.
1. Which three phases make up interphase?
2. Many organelles and molecules needed for cell division are
formed after DNA replication and before mitosis. In which
phase are they formed?
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131
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Mitosis
Mitosis is the process by which the nucleus of most eukaryotic
cells divides. Mitosis has four phases: prophase, metaphase,
anaphase, and telophase.
Color each chromosome in prophase a different color. Follow each of
these chromosomes through mitosis. Show this by coloring the correct
structures in each phase of mitosis.
Use the diagram to answer the questions.
1. In which phase do the chromosomes line up in the middle of
the cell?
2. In which process are two daughter cells formed?
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132
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Class
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Cytokinesis
Cytokinesis is the final step of cell division. During cytokinesis in
plant cells, a cell plate forms between the two daughter cells.
The diagram shows plant cytokinesis in progress.
In the space provided below, draw how the cells will look when
cytokinesis is complete.
Use the diagram to answer the questions. Circle the correct answer.
1. What structure forms in the cell plate?
cell wall
cytoplasm
2. What divides during cytokinesis?
cytoplasm
nucleus
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133