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BIOLOGY Chapter 9: The Cellular Basis of inheritance Name:________________________ Section Goal: The student will describe how cell reproduction contributes to repair and growth and contrast the two main ways that organisms reproduce. Vocabulary: 1. asexual reproduction 2. sexual reproduction’ 3. chromatin 4. chromosome 5. sister chromatid 6. centromere 7. cell cycle 8. interphase 9. mitotic phase 10. mitosis 11. cytokinesis Concept 9.1: All cells come from cells I. Repair and Growth A. The___________________________________ layer of your skin is actually a layer of dead cells B. Underneath the outer layer is a layer of __________________ cells that are constantly reproducing and moving ___________________________ to replace the dead cells that have been rubbed off C. Another function of cell division is _______________________, from one fertilized egg cell there are ____________________________ of cells in your body II. Reproduction A. Cell production of ____________ cells can result in _______________ ________organisms, cell division also has an essential role in the reproduction of __________ organisms B. _____________________________________ is when an organism inherits all of its genetic material from _________________ parent C. ______________________________________ is when an organism inherits its genetic material from ______________________ parents D. All multicellular organisms depend on ____________________ division for growth Section Goal: The student will describe the structure of a chromosome and name the stages of the cell cycle and then explain what happens during each stage. Concept 9.2 The Cell Cycle Multiplies Cells I. Chromosomes and Cell Division A. In eukaryotes, most of the _______________________ material is located within the nucleus as a mass of very long fibers, made of DNA and proteins called __________________________ B. When chromatin ______________________________ it becomes visible as the compact structure ________________________________ C. Before cell division occurs, a cell ______________________ all of its chromosomes, the identical copy is called a sister __________ D. The sister chromatids are joined together in a region called the _________________________ Figure 9-4, pg. 183 II. The Cell Cycle Cells that divide undergo an orderly sequence of events known as the ______________________, which is from the “birth” of the cell to the time it __________________________________ itself Interphase Accounts for about ______________ of the cell cycle Cell grows – ___________ phase (Gap) DNA duplicates – ______________ (Synthesis) Cell prepares to divide – _____________ phase Mitotic Phase Cell is actually dividing – _________________ Two processes: _________- nucleus and chromosomes form “daughter cells” ________________________- cytoplasm is divided in two Lesson Reflection: Using the handout labeled The Mitotic Phase, complete the diagram using the information from page 184 (Figure 9-6) in your book. Lesson Assessment: 1. Relate cell reproduction to the replacement of skin cells. 2. Describe two ways in which asexual and sexual reproduction differ. 3. How is cell division involved in growth? 4. Summarize the events that occur during mitosis and cytokinesis. Summary of Key concepts: Complete the Summary of Key Concepts for sections 9.1 and 9.2 and turn into the box. Technology/Application/Connection to real-world: