Download Bio07_TR_U03_CH10.QXD

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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
Name
Class
Date
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 doubled chromosome (‘X’) 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?
© Pearson Education, Inc., publishing as Pearson Prentice Hall.
132