1. Asexual Reproduction Pg 364-367

2. Introduction  Mitosis is the basis for reproduction by one parent  asexual reproduction  Common in microorganisms, plants, fungi, and some animals  All offspring identical to parents (including DNA) and each other  called clones

3. Budding and Binary Fission  Budding: offspring begins as growth (bud) on parent  When it can survive on its own, the bud detaches  Unequal division of parent organism  Eg: yeast, hydra

4.  Yeast Hydra 

5. Binary Fission  Organism divides into two equal cells  Parent is lost in the process  DNA copied, cells divide  What process is this similar to?  Eg: bacteria and protists

7. Asexual reproduction by binary fission New individuals (Paramecium)

8. Amoeba binary fission

9. A single bacteria cell can reproduce every 20 minutes Over a 12 hour period a single bacterium can produce 10 million copies of itself

10. Which of the following is Budding?

11. Which of the following is Binary Fission? DRAW THE ANSWERS !!

12. Fragmentation  Fragments of the parent break off and grow into new individuals  Can occur by accident or purposely  Eg: planaria

13. Regeneration  Re-growing a lost body part or limb  Usually occurs only if central part of body is intact  Eg: salamanders, starfish, crabs

14. Spore formation  Parent produces spores, which often have protective covering  When conditions are good, they develop into new organism  Eg: plants, algae

15. Asexual reproduction in plants

16. Grafting  Used to propagate a desired variety of shrub or tree  Take a scion (twig) and insert into stock (cut stump)  Eg: all apple trees

18. Vegetative reproduction  Runners: plant sends out aboveground stems  New plant grows at end of runner  Eg: strawberry plants

19. Vegetative reproduction  Other plants produce thickened underground stems  Rhizomes, bulbs, tubers (storage)  Eg: asparagus, tulips, ginger

20. Vegetative reproduction  Leaves can also form new plants  Eg: jade plant  Some plants use roots for asexual repro  Eg: aspen trees, dandelions

21. Outcomes of asexual repro  Genetically identical offspring = clones  When is asexual reproduction beneficial?  -when a organism must reproduce quickly  -when the environment is unchanging  -when a mate is hard to find  What happens when the environment is not predictable?

22. Homework  Review 16.2 #1-7  Read pages 367-372…tomorrow’s topic