Unit6 reproduction liu

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Unit6 reproduction liu

  1. 1. UNIT 6: Reproduction“A Zillion Ways to Make More” Ms.Liu Biology 2/15/12
  2. 2. Sexual ReproductionSperm + ovum  fertilized egg GAMETES ZYGOTEMEIOSIS vs. MITOSIS process(Gametes) (somatic or all other cells)
  3. 3. Asexual ReproductionOne parent cell  identical clones1) Binary Fission 2) Fragmentation 3) Budding 
  4. 4. Reproductive Strategies• Number of offspring per birth: – Offspring = “babies” (but not correct term)
  5. 5. Reproductive Strategies• Reproductive structures: – Sexual = ovary, ova/ovum, testes, sperm, DNA – Asexual =genetic material
  6. 6. Reproductive Strategies• Sexual maturity: – The age at which the organism is old enough to mate, because his/her reproductive organs are fully developed
  7. 7. Reproductive Strategies• Lifespan: – How long the organism lives for• Gestation period: – The incubation time for growth and development of the embryo
  8. 8. Reproductive Strategies• Mating behaviors: – Rituals or activities the organism engages in to attract a mate (there are a variety)
  9. 9. Why is this important?(Think biological continuity!)
  10. 10. Hormones• Male: – Testosterone• Female: – Estrogen – Progesterone – Ova matures and released from ovaries on monthly cycle

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