Biology form 4 – Chapter 5 Mitosis Mitosis is a division of the nucleus to produce two new daughter cells containing chromosomes identical to the parent cell. Significance of mitosis Growth- allows a zygote to produce more cell in order to grow Repair and replacement- allow the multicellular organism maintain its tissues‚ example skin cells and blood Asexual reproduction- clone The cell cycle divided into two major phases a. Interphase b. Mitosis Interphase is the period between division‚ divided
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– The cell replicates its single chromosome – The chromosome copies move apart – The cell elongates – The plasma membrane grows inward‚ dividing the parent into two daughter cells THE EUKARYOTIC CELL CYCLE AND MITOSIS 8.4 The large‚ complex chromosomes of eukaryotes duplicate with each cell division • Eukaryotic genes – Many more
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two cells‚ each with the same amount of genetic material and the same genetic information 11) Which of the following occurs during prophase? - The mitotic spindle begins to form 12) Which of the following is a stage of mitosis? --telophase 13) The correct sequence of stages of mitosis is _____ - prophase‚ metaphase‚ anaphase‚ telophase 14) During metaphase ___ - chromosomes line up in the middle of the cell 15) Which of these events occurs during anaphase? - Sister chromatids separate. 16) During telophase
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Rapid growth of the cell‚ metabolic activity. S- Synthesis‚ DNA replication. G2- Getting ready for cell division. Centrioles replicate Mitosis and Cell Division Function- To grow repair and maintain the cells in the body along with the reproduction of those cells. Results- Two identical daughter cells form from the parent cell. Phases of Mitosis Prophase- Nucleus disappears‚ chromatin forms into chromosomes. Centrioles start to move to outer poles. Spindle fibers start to form Metaphase-
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18. Difference between sister chromatids and homologous chromosomes 19. 2 major phases of cell cycle k. 3 divisions of interphase ii. What happens in each phase iii. Checkpoints l. 4 phases of cell division (mitosis) iv. What happens in each phase v. Cytokinesis 1. When it happens 2. What happens 3. Difference between plant and animal cells 20. Telomere m. How this is thought to be involved
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events of mitosis and show how these differ from meiosis. (V.V.I.) 2. What ‘checkpoints’ occur in cell cycle? What is the role of each? **Long Questions 1.Describe the phases of the cell cycle and the events that characterize each phase. Answer of short Definition is given below 1. Cell Cycle: The cell cycle is an orderly sequence of events that occurs from the time when a cell is first formed until it divides into two new cells. Or the period from the end of the first mitosis division
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Section 1: Binary fission‚ mitosis‚ & meiosis Reading: Chapter 7 Watch and Learn: Mitosis http://www.youtube.com/watch?v=1cVZBV9tD-A&feature=share&list=UUEik-U3T6u6JA0XiHLbNbOw Meiosis http://www.youtube.com/watch?v=rB_8dTuh73c&feature=share&list=UUEik-U3T6u6JA0XiHLbNbOw Basic Learning objectives After completing the readings and practice exercises‚ students should be able to: Describe the process of binary fission. Describe the features and components of eukaryotic chromosomes and sister
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and products Calvin Cycle- reactants and products Cellular Respiration chemical equation Structure of a mitochondria Glycolysis Krebs Cycle Electron Transport Chain Fermentation- Lactic acid and Alcoholic Unit 5- Mitosis and Meiosis (ch. 9‚ 10.1) The Cell Cycle- Interphase‚ Mitosis‚ and Cytokinesis Stages
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(looped around histone proteins) - thread like material (that coils to form chromosomes) - immersed in nucleoplasm - packages and winds DNA up - chromatin plays a role in mitosis - DNA replication - prevents DNA damage - controls gene expression - Chromatin’s thin threadlike structure helps it undergo mitosis where it forms into chromosomes. - packages and winds DNA up so that it has a smaller volume. A smaller volume allows the DNA to fit in the cell Chromo-somes - Usually
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division. They are binary fission‚ mitosis‚ and meiosis. When cell division is in the form of mitosis it is usually associated with cell growth‚ replacement‚ and repair. When the cell goes through meisosis it usually involves asexual reproduction. Both the process of mitosis and meiosis involve the duplication of the DNA and the splitting of the nucleus. Mitosis is a type of cell division that produces two genteically identical cells from a single cell. Mitosis is basically a process that cells
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