1. Comparing Reproduction Styles

2. REPRODUCTION ASEXUAL REPRODUCTION
Reproduction is the creation of new individuals from existing individuals
This can happen in two ways:
SEXUAL
REPRODUCTION ASEXUAL REPRODUCTION

3. Reproduction comes in two “flavors” (draw this chart on your paper)
Sexual Repro
Asexual Repro
# of Parents
Offspring Variation
Speed
Energy Required
Efficient? 3

4. Sexual Reproduction Most people know how this happens 
No, you don’t have to diagram anatomy
Male parent cell +
female parent cell
Half of the genetic information from each parent
Some organisms have both male and female parts (eg. Worms, trees, flowers, some fish)

5. Sexual Reproduction - Advantages
Big asset to sexual reproduction is that the offspring will NOT be the same as the parents.
Since only ½ of the genetic blueprint comes from each parent, VARIATION is high.
Offspring can survive where parents cannot

6. Sexual Reproduction - Disadvantages
Takes lots of energy to form sex cells: eggs/sperm/pollen
Takes lots of time to locate a mate, then convince that mate that “you are the one.”
Is not very efficient – many cells are lost

7. Examples of Sexual Reproduction:
Mammals
Birds
Fish
Insects
Plants that produce pollen
Pollen is plant sperm
No wonder it
makes you sneeze!
If it has flowers = sexual
reproduction

8. Fill in the “Sexual” half of your chart
Sexual Repro
Asexual Repro
# of Parents
Offspring Variation
Speed
Energy Required
Efficient?

9. Some Common Forms of Asexual Reproduction:
Budding
Stolons
Fragmentation
Regeneration
Binary Fission (split in 2)

10. Budding Offspring grows out of the body of the parent.
Offspring breaks off when it is mature enough.
Example: Hydra
tulips

11. Stolons Plants that are in a good location send out a runner
This runner becomes a new plant that can be separated
Eg. strawberries,
Aspen - largest

12. Fragmentation Parent breaks into pieces
Each piece can regenerate to produce an offspring
Example: Planaria – divides down the middle

13. Regeneration
If a piece of a parent is detached, it can re-grow the detached part to become whole again.
The detached portion can also re-grow the missing parts to become whole again
Example: Sea Stars

14. Binary Fission Binary means 2 Fission means split Happens mostly in
simple, single celled
organisms
Example: bacteria

15. Man-Made Asexual Reproduction
Grafting
Cloning

16. Grafting Done only with human intervention
A tree trunk is grafted onto healthy root stock.
Eg: Apple Trees

17. Cloning
A human takes an egg cell from a donor female and a somatic (i.e. skin) cell from a second donor, then places the nucleus of the somatic cell into the egg cell.
The human implants the “complete” embryo into a third surrogate mother, then the embryo develops and is born like a regular baby.
Eg: Dolly the Sheep

18. Fill in the “Asexual” half of your chart
Sexual Repro
Asexual Repro
# of Parents
Offspring Variation
Speed
Energy Required
Efficient?