1. Asexual and Sexual Reproduction
I can identify the difference between sexual and asexual reproduction.

2. QW#6 What is the difference between sexual and asexual reproduction?

3. State Standards 6th Grade Life Science 4 6th Grade Life Science 5
Recognize that an individual organism does not live forever; therefore reproduction is necessary for the continuation of every species and traits are passed onto the next generation through reproduction
6th Grade Life Science 5
Describe that in asexual reproduction all of the inherited traits come from one single parent
6th Grade Life Science 6
Describe that in sexual reproduction an egg and sperm unite and some traits come from each parent, so the offspring is never identical to either of its parents
8th Grade Life Science 1
Describe that asexual reproduction limits the spread of detrimental characteristics through a species and allows for genetic continuity

4. Reproduction
There are about 1.5 million different types of living species known
Some reproduce sexually, asexually, or both

5. Purpose of Reproduction
To make sure a species can continue.
Definition: Reproduction is the process by which an organism produces others of its same kind.

6. Asexual Reproduction
Asexual reproduction= is a process that involves only one parent and produces offspring that are identical to the parent
Advantage- asexual reproduction limits the spread of detrimental characteristics
Disadvantage- is asexual reproduction the organism can not adapt to change in the environment

7. 1st Type of Asexual Reproduction
Budding is another form of asexual reproduction where a growth of a copy of the adult buds from the adult itself until the bud breaks off and becomes its own organism
This happens in yeast
Very Common in Plants

8. Budding Example Fungi are eukaryotic organisms.
They are also saprophytic (this means they get their food from dead organic matter)
Fungi can be multicellular or unicellular (yeast)
Some are parasitic (ringworm, athlete’s foot)

9. Budding Example
Yeast
Yeast are unicellular fungi that reproduce by budding
Budding occurs rapidly under ideal conditions (mixed with sugar and water in warm temps)

10. 2nd Type of Asexual Reproduction
Fission (Binary) is another form used by some single-celled organisms such as bacteria or amoeba
Becoming two by division of the complete organism.
The organism divides by mitosis to make a new cell

11. Protists Protists are single-celled eukaryotic organisms
Protozoans are named b/c they are “animal-like” and actually resemble eukaryotes in the way they work than prokaryotes like bacteria
Ex: Paramecium can reproduce asexually by fission or sexually by conjugation

12. 3rd Type of Asexual Reproduction
Regeneration
The ability to restore lost or damaged tissues, organs or limbs.
It is a common feature in invertebrates, like worms and starfish.

13. Sexual Reproduction
Asexual Reproduction – genetic material of one individual is passed onto the next
Sexual Reproduction – genetic material of two individuals are combined
In sexual reproduction an egg and sperm unite and some traits come from each parent, so the offspring is never identical to either of its parents produced in meiosis
Combining two individual’s genes creates variability in the population (an advantage in a changing environment)

14. Sexual Reproduction
When a zygote is formed, it divides by mitosis creating 2, 4, and 8 celled stages and then forms a mass of cells called a morula
Further mitosis creates a hollow ball of cells called a blastula (~1,000 cells)
Subsequent divisions create tissue layers in the gastrula
Gestation (the period of time it takes for an embryo to grow and change into an individual) can take no more than 3 weeks for a chicken but up to 2 years for an elephant
Humans ~ 9 months

15. Sexual Reproduction
Look at prepared slides of the following stages of starfish development:
Egg
2-cell stage
4-cell stage
8-cell stage
Morula
Blastula
Gastrula