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Name 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? © Pearson Education, Inc., publishing as Pearson Prentice Hall. 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