Cell Cycle and Mitosis Worksheet PDF

Section Name Date The Cell Cycle and Mitosis 5.1...

Section Name Date The Cell Cycle and Mitosis 5.1 Summary Textbook pages 150–165 Before You Read How do cells replace themselves? Record your ideas on the lines below. ◆ growth and cell activity ✏ Mark the Text cytokinesis Create a Chart Highlight the text that describes the three stages of the cell cycle. In a different colour, highlight DNA is copied Inter phase text that describes how cells divide. Use the highlighted text to create a chart about mitosis the life of a cell. continued growth and preparation for mitosis What is the cell cycle? The three stages of the life of a cell together are called the cell cycle. These three stages are: ◆ interphase: This stage makes up most of the life of the cell. During interphase, cells grow and carry out their life functions. In cells that will divide, the nucleus makes a copy of its DNA in a process called replication. ✔ Reading Check 1. What are the three stages ◆ mitosis: During this stage, the nucleus of the cell divides into two equal and identical parts. Each part has a copy of in the life of a cell? the DNA. ◆ cytokinesis: During this stage, the two equal, identical parts of the cell separate. The result of this stage is two identical cells, each with a nucleus and DNA. ✔ 68 MHR Section 5.1 The Cell Cycle and Mitosis © 2007 McGraw-Hill Ryerson Limited  Section Name Date 5.1 Summary continued What are the phases of mitosis? There are four phases of mitosis. These phases are prophase, metaphase, anaphase, and telophase. Phases of mitosis What happens prophase the duplicated chromosomes form into an X shape and the nucleolus disappears. spindle fibres, which are tiny tube-like struc- tures made of protein, begin to form in plant and animal cells metaphase the duplicated chromosomes line up across the middle of the cell anaphase the duplicated chromosomes move apart to opposite ends of the cell telophase a nucleolus forms around the chromosomes at the opposite ends of the dividing cell How can mutagens affect the cell cycle? Mutagens can cause changes in the cell cycle so that cells keep ✔ Reading Check 2. What is cancer the result dividing continuously. The cells pile up on top of one another, forming a lump called a tumour. The uncontrolled cell division of ? sometimes results in diseases called cancers. Cancerous cells may grow in one place in the body, or they may spread to other parts of the body where they will continue to divide. ✔ © 2007 McGraw-Hill Ryerson Limited Section 5.1 The Cell Cycle and Mitosis MHR 69 Name Date Comprehension Section 5.1 Use with textbook pages 153–158. Getting to know the cell cycle Vocabulary anaphase mitosis cell cycle nucleolus cytokinesis nucleus DNA prophase duplicated chromosomes telophase four three interphase two metaphase Use the terms in the vocabulary box to fill in the blanks. You can use each term more than once. You will not need to use every term. 1. There are stages in the life of a cell. 2. The stage that makes up most of the cell’s life is. During this stage, cells grow and carry out their life functions. In cells that will divide, the nucleus makes a copy of its. 3. During , the nucleus of the cell divides into two equal and identical parts. Each part has a copy of the DNA. 4. During , the two equal, identical parts of the cell separate. This stage forms identical cells with a nucleus and DNA. 5. There are phases of mitosis. 6. In , the duplicated chromosomes contract into an X shape and the disappears. 7. In , the line up across the middle of the cell. 8. In , the move apart to opposite ends of the cell. 9. In ,a forms around the chromosomes at the opposite ends of the dividing cell. 70 MHR Section 5.1 The Cell Cycle and Mitosis © 2007 McGraw-Hill Ryerson Limited  Interpreting Name Date Illustrations Section 5.1 Use with textbook pages 150–165. Identifying stages of the cell cycle Vocabulary continued growth and preparation growth and preparation cytokinesis interphase replication mitosis Use the vocabulary words in the box above to label the stages of the cell cycle in the following diagram. 1. 5. 2. 4. 6. 3. Briefly describe what is occurring in each stage of the cell cycle. 1. 2. 3. 4. 5. 6. © 2007 McGraw-Hill Ryerson Limited Section 5.1 The Cell Cycle and Mitosis MHR 71  Illustrating Name Date Concepts Section 5.1 Use with textbook pages 156–157. Mitosis Summarize what is happening in the cell for each phase of mitosis. Then draw a labelled diagram of each phase. Phase What is happening in the cell? Labelled diagram prophase metaphase anaphase telophase 72 MHR Section 5.1 The Cell Cycle and Mitosis © 2007 McGraw-Hill Ryerson Limited  Assessment Name Date Section 5.1 Use with textbook pages 150–161. 7. Which stage is the longest in the cell cycle? A. interphase The cell cycle and B. mitosis mitosis C. cytokinesis Match each Term on the left with the best D. DNA replication Descriptor on the right. Each Descriptor may be used only once. 8. The phase of mitosis where the chromosomes line up across the middle of Term Descriptor the cell is 1. cell cycle A. first and longest stage A. anaphase of the cell cycle 2. cytokinesis B. metaphase B. process during which 3. interphase the cell copies DNA C. prophase 4. mitosis information in the D. telophase nucleus 5. replication C. result of uncontrolled 9. The phase of mitosis in which the cell division duplicated chromosomes form into an D. process in which the X shape is duplicated contents of the cell’s nucleus A. anaphase divide into two equal B. metaphase parts E. three stages of the life C. prophase of a cell D. telophase F. final stage of the cell cycle, which separates 10. The phase of mitosis in which duplicated the two nuclei and the chromosomes move apart to opposite ends cell contents into two of the cell is identical cells A. anaphase B. metaphase Circle the letter of the best answer. C. prophase 6. Tiny tube-like structures made of protein D. telophase are called 11. The phase of mitosis in which a nucleolus A. spindle fibres forms around the chromosomes is B. chromosomes A. anaphase C. nucleolus B. metaphase D. DNA replication C. prophase D. telophase © 2007 McGraw-Hill Ryerson Limited Section 5.1 The Cell Cycle and Mitosis MHR 73