How do little elephants grow up to be BIG elephants? Agenda • Warm up – How do little elephants grow up to be BIG elephants? • Check bookwork HW • Cell cycle slides • Cancer slides • Cell cycle worksheet (goes in notebook) Interphase • Interphase: – most of the cells "life“ • Parts of Interphase: – G1phase: – spends most of its functional life – performing their assigned tasks, metabolizing, synthesizing etc. – something triggers the cell to begin a cell division event • Stimuli to start a cell division: – To replace dead or dying cells, – To produce more cells to enlarge the organism (growth and development) – Reproduction, i.e. to increase the number of unicellular organisms. S - Phase • = synthesis phase. • DNA molecules are copied or replicated, Gap 2 or G2 Phase • The cell is preparing for the actual division events (lots of protein synthesis). – tubulin synthesized (protein that makes up microtubules) – used to manufacture the spindle apparatus • G2 completes interphase now the cell is prepared for mitosis.
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