Download Sexual and Asexual Reproduction

Sexual and Asexual Reproduction
Unicellular organisms
Amoeba with
“issues”
Multi-cellular organisms
Amoeba
Many
Paramecium
feeding
on decaying
matter.
Bacteria
The following slides and video clips involve cellular reproduction
What do both of these terms mean?
Asexual reproduction
The production of new organisms from only one parent.
Sexual reproduction
When sex cells from two parents (plant or animal) combine to form a new organism.
Reproduction of Single and
Multi-cellular organisms
The Basics: Single-Celled vs. Multicellular Reproduction (02:55)
Sexual Reproduction
Sexual Reproduction (00:58)
Asexual Reproduction
An individual
organism
produces
genetically
identical
offspring.
(e.g., fission of
bacteria,
"budding off" of
Hydra)
The Asexual Reproduction of the Hydra (02:36)
Reproduction on the Unicellular level
Asexual Reproduction (01:04)
Comparing both types of Reproduction
Comparing Asexual and Sexual Reproduction in Different Species (01:04)
Sexual and Asexual
Reproduction in Plants
Plants Reproduce in two ways:
Asexual Reproduction
•Which produces a new plant Identical to the parent
Sexual Reproduction.
•Which involves the fusion of an ovule and a pollen grain.
to produce a new plant
•Usually two plants are involved
•The new plant contains characteristics from both parents.
Examples of Asexual plants
Means that new plants are formed from only one parent. Examples of
Asexual Reproduction are:
Strawberry Runners. These are stems which grow from the base of
strawberry plants. When they touch the ground they form new plants
Daffodil Bulbs. These increase in number each year. Producing Clones
of the original plant.
Plant Cuttings. If you take a cutting from a Geranium Plant and place it
in soil it may grow to produce a new Geranium Plant
Lets take a look at sexual
reproduction with plant life.
Watch the next video clip and
we’ll discuss the difference between
asexual and sexual reproduction
with plants
In sexual reproduction, the genetic material from two parents combines to
form offspring who are genetically distinct from their parents
The Reproduction of Flowering Plants (01:20)
The video clip you just watched was an example of
sexual reproduction occurring with a tomato plant.
1. Why is this considered sexual and
not asexual reproduction? Explain.
*Sexual reproduction requires
genetic material from a male
and female.
*Asexual reproduction is the
production of new organisms
from only one parent.
2. Is the tomato plant considered
a unicellular or multicellular
organism?
*The tomato plant is a multi-cellular organism
Bio review of Asexual
and Sexual Reproduction
Time for a mini-quiz!!!!
Directions: Label each sexual or asexual?
1. An organism produces offspring without fertilization
asexual
2. A vine (runner) from a strawberry plant produces another plant
3. A spider plant is split placed in water and develops new roots
4. A flower is pollinated and develops fruit
5. The offspring is identical to the parent
asexual
asexual
sexual
asexual
6. Two apple trees exchange genetic material (pollen from the male) sexual
7. Bacteria reproduce this way
asexual
8. Produces a large number of offspring (improves its chances for survival)
9. Doesn’t need to find a mate
asexual
asexual
10. Each generation is different helping to insure survival in different environments
sexual
11. Humans, birds, fish, cats, lions…. reproduce sexual