chapter 9 - Chapter 9 Cell division and mitosis...

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October 27, 2005 Chapter 9 Cell division and mitosis Understanding cell division ~ What instructions are necessary for inheritance? ~How are those instructions duplicated for distribution into daughter cells? ~By what mechanisms are instructions parceled out to daughter cells? Reproduction ~Parents produce a new generation of cells or multi-celled individuals like themselves ~Parents must provide daughter cells with hereditary instructions, encoded in DNA, and enough metabolic machinery to start up their own operation. Division Mechanisms ~Eukaryotic organisms -mitosis -meiosis ~Prokaryotic organisms -prokaryotic fission Prokaryotic Division ~also called “binary fission” ~The single chromosome in bacteria makes the cell cycle less complex ~Steps -Chromosome replicates -chromosomes attach to membrane -membrane elongates -membrane pinches inward -new cell wall forms Roles of Mitosis ~multi-celled organisms -growth -cell replacement ~some protistans, fungi, plants, animals -asexual reproduction Chromosome- a DNA molecule & attached proteins. Look up picture of centromere
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