1. Comparing Reproduction Styles
Write down the stuff in RED at least…

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. Introductory Video http://www.youtube.com/watch?v=jk2RJm5RBEk
Click above for a good intro video on reproduction

4. Make this chart in your notes
Sexual Repro
Asexual Repro
# of Parents
Offspring Variation
Speed
Energy Required
Efficient?

5. Sexual Reproduction Most people know how this happens ☺
No, you don’t have to diagram anatomy
Male parent cell +
female parent cell
Half (50%) of the genetic information from each parent
Some organisms have both male and female parts (eg. Worms, trees, flowers, some fish)

6. 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

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

8. Examples of Sexual Reproduction:
Mammals
Birds
Fish
Insects
Plants that produce pollen
Pollen is plant sperm
If it has flowers = sexual
reproduction

9. Fill in the “Sexual” half of your chart
Sexual Repro
Asexual Repro
# of Parents
Offspring Variation
(How much alike are parents and babies?)
High Medium None
Speed
(How relatively fast is this type?)
Fast Medium Slow
Energy Required
(How much energy is required for making structures or special cells?)
High Medium Low
Efficient?
(How many cells actually turn into offspring?)
High Medium Low

10. Asexual Reproduction Asexual means without sex Only one parent
100% of genetic information is passed, so offspring are identical
Since one cell = one baby, this method is fast and efficient

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

12. Budding Offspring grows out of the body of the parent.
Offspring breaks off when it is mature enough.
Example: Hydra
Tulips
Hydra
Tulips
Yeast

13. 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 (Pando)

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

15. 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

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

17. Man-Made Asexual Reproduction
Grafting
Cloning

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

19. 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

20. Fill in the “Asexual” half of your chart
Sexual Repro
Asexual Repro
# of Parents
Offspring Variation
(How much alike are parents and babies?)
High Medium None
Speed
(How relatively fast is this type?)
Fast Medium Slow
Energy Required
(How much energy is required for making structures or special cells?)
High Medium Low
Efficient?
(How many cells actually turn into offspring?)
High Medium Low