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Reproduction

Reproduction. The crazy and wacky world of reproduction!. Asexual vs. Sexual. Asexual Reproduction: Requires 1 parent Allows rapid reproduction Less genetic diversity  Why a problem? Parthenogenesis : only females! Rarely occurs… Sexual Reproduction:

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Reproduction

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  1. Reproduction The crazy and wacky world of reproduction!

  2. Asexual vs. Sexual • Asexual Reproduction: • Requires 1 parent • Allows rapid reproduction • Less genetic diversity  Why a problem? • Parthenogenesis: only females! Rarely occurs… • Sexual Reproduction: • Requires 2 parents of different sexes  Is this a problem? • Creates new combination of genes  Genetic Diversity

  3. Hermaphrodites Contain both male and female organs! OR Can convert from one sex to another! Some species produce eggs and sperm at the same time Other species: change sex as they mature * These species DO NOT fertilize their own eggs!

  4. Think, Pair, Share WHY be a hermaphrodite? Brainstorm at your seats with your table…. Share with the class.

  5. Internal vs. External Fertilization • Internal Fertilization: eggs are fertilized inside the body of the egg-producer • Benefits: • Costs: • External Fertilization: eggs are fertilized outside the body of the egg-producer • Benefits: • Costs:

  6. Reproductive Diversity • Aquatic Living: • External fertilization; external “birth” • Internal fertilization; “birth” • Living on Land: Amniotic Egg • Reptiles & Birds move to land • Developed Amniotic Egg • Allowed them to lay eggs on land! Keeps eggs moist! • Mammalian Strategies: • On land & water • Nourish with mother’s milk • Includes: Monotremes (eggs inside body), Marsupials (pouch), Placental mammals

  7. Reproduction Activity The crazy and wacky world of reproduction!

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