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Meiosis and Sexual Reproduction: Promoting Genetic Variation and Patterns of Inheritance

This outline provides an overview of sexual reproduction, focusing on meiosis and its stages, highlighting the differences between meiosis and mitosis, and explaining how sexual reproduction promotes genetic variation. It also explores patterns of control of gene expression and inheritance.

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Meiosis and Sexual Reproduction: Promoting Genetic Variation and Patterns of Inheritance

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  1. OUTLINE 10 1. Meiosis and Sexual Reproduction A. Overview of sexual reproduction 1. germ cells and somatic cells 2. homologous chromosomes B. Overview of Meiosis C. Stages of meiosis 1. meiosis 1 2. meiosis 2 3. Differences between meiosis and mitosis D. How sexual reproduction promotes genetic variation 1. fertilization 2. crossing-over 3. independent assortment

  2. Patterns of control of gene expression Negative control - an active regulatory protein turns transcription OFF Induction - signal molecule turns the operon on Repression - signal molecule turns the operon off Positive control - an active regulatory protein enhances the rate of transcription Induction - signal molecule makes the regulatory protein active Repression - signal molecule makes the regulatory protein inactive

  3. Patterns of Inheritance twins sisters brothers Father and son Family Mom and offspring

  4. Human Female Karyotype

  5. Fig. 13.7

  6. Fig. 13.7

  7. Fig. 13.8 Differences between mitosis and meiosis

  8. Fig. 13.10 Crossing over

  9. Fig. 13.9 Independent Assortment

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