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Genetics Recall Cell Theory states that: Somatic cells reproduce/divide using the process of MITOSIS http://www.youtube.com/watch?v=VlN7K19QB0 http://www.youtube.com/watch?v=m73i1Zk8EA0 http://www.youtube.com/watch?v=s1ylUTbXyWU http://www.youtube.com/watch?v=CzPGhYiGyZ8 http://www.youtube.com/watch?v=eFuCE22agyM 1 Stages of Mitosis: IPMAT Interphase Prophase Metaphase 2 Anaphase Telophase Cytokinesis 3 Cell Cycle Drag the terms to label the cell cycle diagram. S SE HA RP TE IN G1 NESIS CYTOKE SE AS PH M A AN E SE HA P TA HA OP G2 PR IS OS IT E M SE A OPH TEL 4 The Cell Cycle Match the terms to the events of the cell cycle G1 Phase • Division of nuclear material: the nucleus divides in two with a complete set of DNA instructions moving to each pole of the cell S Phase • Cell Growth: Cell is actively performing its function and is increasing its size G2 Phase • DNA Replication: Each DNA molecule is copied so that when the cell divides each daughter cell will receive one complete set of instructions Mitosis • Cytoplasmic Division: the cytoplasm and organelles divide so that 2 functioning daughter cells are produced Cytokenesis • Preparation for Mitosis: The cell is approaching its maximum size and doing final preparations for cell divisions 5 Terms to know: drag the term to its definition centromere • the sticky region that holds two sister chromatids together chromosomes sister chromatids • two parts of a double-stranded chromosome that have identical instructions • structures stored in the nucleus that code the instructions to form each new cell diploid gametes • two copies of each chromosome • reproductive cells parent cell • the original cell that will divide to form two new cells daughter cell • a new cell produces through cell division of a parent cell mutations • errors in mitosis or DNA replication crossing over process during which non-sister chromatids exchange that can result in damaged cells • genetic information homologous chromosomes haploid • similar chromosomes that form pairs, one from your mother and one from your father • only one copy of each chromosome 6 Getting it straight: Sister chromatids and homologous chromosomes Consider chromosomes as they appear, short and thick, in metaphase 7