1. Asexual Reproduction Section 2.6, p. 57

2. Sexual vs. Asexual There are 2 types of reproduction: ◦Sexual reproduction  Two parents contribute genetic information (DNA) to produce a zygote. ◦Asexual reproduction  Involves only one parent.

3. Types of asexual reproduction There are many different kinds of asexual reproduction for many different kinds of organisms. Offspring from asexual reproduction are clones. ◦Clones contain DNA that is identical to the DNA of the parent, so they are genetically identical.

4. Types of asexual reproduction Binary Fission ◦The parent undergoes cell division to produce 2 genetically identical daughter cells or offspring. ◦Only single-celled organisms like bacteria use binary fission.

5. Types of asexual reproduction Binary Fission ◦Populations can grow rapidly!  Some bacteria can double every 20 minutes!  If they are disease causing, this is how they cause an infection.  If some protists do this is in the ocean, we get red tide.

6. Types of asexual reproduction Budding ◦In budding, the offspring begin as a bud (a small growth on the parent). ◦The bud grows, then breaks off the parent.

7. Types of asexual reproduction Budding ◦Budding happens in some single-celled and some multicellular organisms. ◦These offspring are genetically identical to the parent.

8. Types of asexual reproduction Vegetative Reproduction ◦This is how plants can reproduce asexually. ◦All kinds of vegetative reproduction produce clones.

9. Types of asexual reproduction Vegetative Reproduction ◦Some plants send out runners.  These are special stems that grow horizontally and can grow roots to become an independent plant.

10. Types of asexual reproduction Vegetative Reproduction ◦Some plants send out shoots from the base of the trunk or underground stems which grow into new plants.

11. Types of asexual reproduction Vegetative Reproduction ◦Cuttings from some plants can grow roots. ◦There are also bulbs and tubers.

12. Types of asexual reproduction Fragmentation ◦A small part of the animal breaks off then grows into a new animal. ◦Regeneration is necessary, it is when new parts grow back on the fragment.

13. Types of asexual reproduction Spore Formation ◦Spores are cells with thick walls, almost like seeds. ◦They are produced by cell division. ◦Offspring produced by spores are genetically identical to parents.

14. Important notes Only 1 parent is needed for asexual reproduction. All the offspring are genetically identical to the parent. A single organism can produce large numbers of offspring.

18. m