Lec 6,7 notes - Lecture 6: Cell Division Lecture 7: Meiosis...

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Lecture 6: Cell Division Lecture 7: Meiosis and Sexual Life Cycles I. Cell Cycle A. Interphase 1. G1: cell growth and maintenance a. Interphase gap before duplication 2. S: DNA is synthesized; chromosomes are copied and doubled in preparation for division 3. G2: cell growth and maintenance/ preparation from division (organelle and protein synthesis) a. Interphase gap before mitosis 4. G0: cell stops dividing 5. chromosomes are not visible because they are diffuse a. called chromatin B. M phase 1. C. G1 S G2 M G1 or G0 II. Mitosis A. Purpose: growth or asexual reproduction B. Occurs in somatic cells C. Results in the formation of two genetically identical daughter cells from one parent cell D. Allows growth from a zygote to a mature human E. Phases 1. Prophase a. Chromosomes condense b. Centrosomes migrate 2. (Prometaphase) a. Nuclear evelope breaks down b. Spindle formation occurs 3. Metaphase a. Chromosoms align at cell’s equator 4. Anaphase a. Sister chromatids separate
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This note was uploaded on 10/13/2008 for the course BIO 150 taught by Professor Schmidt during the Spring '08 term at SUNY Stony Brook.

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Lec 6,7 notes - Lecture 6: Cell Division Lecture 7: Meiosis...

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