biology- exam3

biology- exam3 - Test 3 Study Guide Spring 2008 General...

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Test 3 Study Guide Spring 2008 General Biology Covers Mitosis, Meiosis, Reproduction, Nervous System 1. Know all the names of all the stages of mitosis. Interphase: when DNA replicates. 3 phases- G1- organelles duplicate, S- DNA in the chromosomes replicate, G2- Proteins are synthesized. Mitosis: when the copied chromosomes move into the daughter nuclei; prophase, metaphase, anaphase, telophase. Cytokinesis: cytoplasm of the parent cell splits. 2. Know what the purpose of mitosis is: Asexual division that produces daughter cells that are the exact copy of the parent cell. 3. Know what happens to chromosomes during each phase of mitosis: Interphase: Chromosomes replicate during the S (synthesis) stage. Mitosis: Prophase - replicated chromosomes condense. Microtubules help cells to expand and move chromosomes around during cell division by lengthening and binding to the chromosomes. Metaphase : Replicated chromosomes are aligned across the middle of each cell. Microtubules, attached to each chromosome at the centromere, line up the chromosomes singe-file across the middle of the cell. Anaphase: The centromere splits, and the microtubules shorten, pulling each sister chromatid of a chromosome to the opposite poles of a cell. Telophase:
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biology- exam3 - Test 3 Study Guide Spring 2008 General...

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