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Lesson 5 Mitosis What is Mitosis? Why is mitosis important? Do Now Mitosis Know Want to Know Learned Essential Question • What is mitosis? • Why is it important? Vocabulary Mitosis Chromosomes Asexual reproduction Assignment 1. Read pages 96-102. 2. Complete the graphic organizer. Why is cell division important? The Cell Cycle Mitosis Asexual Reproduction Why is cell division important? • Cell division increases the number of cells in an organism causing it to grow. • Cells continue to grow and replace worn out cells. • One-celled organisms reproduce by cell division. The Cell Cycle • Length of cycle is different for all types of cells. • Interphase- cell grows and functions, organelles duplicate, DNA is copied, chromosomes duplicate, cell grows and prepare for mitosis. Mitosis • It is the division of a nucleus. • It produces two new nuclei that are identical to each other and the original nucleus. • Each new nucleus has the same number and type of chromosomes. • Include the following steps – – – – – prophase metaphase anaphase telophase cytoplasm divides Mitosis Video • mitosis.asf Asexual Reproduction • A new organism is produced from one organism. • Reproduce by fission-an organism that does not have a nucleus copies its genetic material and divides into two identical organisms. • Asexual_Reproduction.asf Ticket Out the Door Answer the essential question.
