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Reproduction Asexual vs. Sexual

BB: Asexual vs. Sexual Reproduction Please copy this chart in your notebook – use the WHOLE page. Reproduction Asexual vs. Sexual. Purpose of Reproduction. To make sure a species can continue.

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Reproduction Asexual vs. Sexual

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  1. BB: Asexual vs. Sexual ReproductionPlease copy this chart in your notebook – use the WHOLE page.

  2. Reproduction Asexual vs. Sexual

  3. Purpose of Reproduction • To make sure a species can continue. • Definition: Reproduction is the process by which an organism produces offspring of the same kind. • There are 2 types of reproduction: • Asexual • Sexual

  4. Asexual reproduction- What? • A form of reproduction which does not involve fertilization (does not depend on male and female parts) • A new organism (sometimes more than one) is produced from only one organism. • Asexual reproduction = one parent. • Produces offspring that are genetically identical to their parent

  5. Asexual Reproduction- Who? • The primary form of reproduction for single-celled organisms (ex: bacteria) • Many plants and fungi reproduce asexually as well. • Some animals reproduce asexually as well (sponges, hydras)

  6. Asexual Reproduction- Types? • There are several types of asexual reproduction: • Budding • Binary Fission • Regeneration

  7. Budding • Asexual • Offspring grows out of parent • Yeast, hydras • + Fast, somewhat easy • - Same DNA

  8. http://www.waycross.edu/faculty/bmajdi/hydra%20budding.jpg

  9. http://judyepstein.com/images/DesertImages/Budding-Purple-LG.jpghttp://judyepstein.com/images/DesertImages/Budding-Purple-LG.jpg

  10. Binary Fission • Asexual • Cell splits and replicated DNA goes with each part • Bacteria • + Fast and easy • - Everybody has the same DNA

  11. http://wappingersschools.org/RCK/staff/teacherhp/johnson/visualvocab/BinaryFissionParamecium.jpghttp://wappingersschools.org/RCK/staff/teacherhp/johnson/visualvocab/BinaryFissionParamecium.jpg

  12. http://coris.noaa.gov/glossary/binary_fission_186.jpg

  13. Fragmentation/ regeneration • Asexual • The ability to restore lost or damaged tissues, organs or limbs. • It is a common feature in invertebrates, like worms and starfish. • + Easy • - Parent broken, same DNA

  14. Fragmentation/ regeneration Moss

  15. http://www.vsf.cape.com/~jdale/science/starfishregenerating.jpghttp://www.vsf.cape.com/~jdale/science/starfishregenerating.jpg

  16. Sexual Reproduction- What? • Requires BOTH male (sperm) and female (ovum- egg) gametes (sex cells) • The ovum and sperm join to form an entirely new organism that is genetically different from both parents • This results in increasing genetic diversity of the offspring.

  17. Sexual Reproduction: Who? • Primary method of reproduction for the vast majority of visible organisms, including almost all animals and some plants.

  18. IMPORTANT! • Asexual reproduction results in offspring that are genetically identical to the parent organism • Sexual reproduction results in offspring that are genetically different from the parent organisms

  19. Pollination- sexual reproduction in flowering plants • Sexual • Pollen is delivered to female part of plant • Occurs in flowering plants • + Plants don’t have to move, mixes DNA • - Need external source for pollination to take place; wind, bee, bat, butterfly etc.

  20. Pollination

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