Keystone: Topic 4 Cell Division
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What are the three reasons that cells typically divide
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1. To Grow 2. Repair 3. Reproduction
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The longest phase of the cell cycle is
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Interphase
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G1 is about
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Cell Growth
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How does a duplicated strand of DNA end up being identical to the original strand
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DNA replication
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The last stage of interphase is
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G2
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In mitosis, the goal is to get the cells that are genetically 2N -> 2N
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Identical
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DNA condenses; nuclear breaks down
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Prophase
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Chromosomes line up in middle of cell
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Metaphase
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Chromosomes move to opposite ends of cell
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Anaphase
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Nucleus reforms, DNA loosens, last stage
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Telophase
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What is the difference between plant and animal telophase/cytokinesis
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In animals the \"cleavage furrow\" forms. In the plant the \"cell plate\" is formed
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What does meiosis do to the number of chromosomes
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Cute the number of DNA in half
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Meiosis goes from 2N -> ___ or from Diplois -> ____
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N Haploid
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What is crossing over
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Exchange of parts of DNA between 2 structures
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When does crossing over occur
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prophase 1
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What is the idea of independent assortment
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Separated different genes from each other once reproductive cells are present
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When chromosomes fail to separate properly it is known as
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Nondisjunction
