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Animal Reproduction

Animal Reproduction. Chapter 46. Goals:. Big Idea #1: Evolution Big Ideas #2 & 4: Organization of the human reproductive system: Organ /Organ system level Cellular level Homeostasis and Feedback. Do all animals reproduce sexually?. All animals have a sexual life cycle.

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Animal Reproduction

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  1. Animal Reproduction Chapter 46

  2. Goals: • Big Idea #1: Evolution • Big Ideas #2 & 4: Organization of the human reproductive system: • Organ /Organ system level • Cellular level • Homeostasis and Feedback

  3. Do all animals reproduce sexually? • All animals have a sexual life cycle. • Is sex an advantage in good times or bad? • Individual animals may reproduce asexually • Red Queen Hypothesis • Hydra (Mastering Biology Video Clip)

  4. Regulation of hermaphrodites • What might be altering gene regulation?

  5. Red Queen Hypothesis

  6. Female Reproductive System • 46.4 Activity on Mastering Biology • Know major tissues • Role of fallopian tubes in fertilization • Critical thinking: Why do fertility rates rise and fall during the menstral cycle?

  7. Oogenesis

  8. Hormonal Regulation of Reproduction • STEROID HORMONES • Differentiate males and females: • Estrogen & Testosterone • PROTEIN HORMONES • Same structure; different targets in M & F: • GnRH • FSH • LH

  9. Female Regulation • How does hormonal supplementation with estrogen and progesterone act as birth control?

  10. Male Reproductive System • Mastering Biology: • Know major tissues • Role of the testis and structure meets function Critical thinking: Why does a vasectomy drastically reduce the chance of fertility?

  11. Spermatogenesis

  12. Male Regulation How would anabolic steroids affect negative feedback?

  13. Combining of male and female gametes How is apoptosis activated to prevent double fertiization?

  14. Regulation of Birth and Milk Production • What type of feedback is this? • Why is this type of feedback useful? • How could this system be used to induce labor?

  15. Biotechnology • Discussion: In what ways is biotechnology introducing a “Brave New World” of Reproduction? • What are the ethical implications?

  16. Formative Assessment • How does the organization of either the male or female reproductive system aid in its function? • How is reproduction regulated and how can this regulation be affected? • Is sex always an advantage? When might it not be an advantage for an animal to reproduce sexually?

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