3/20/2015 3/20/2015 Starter: Starter: Quiz 202 202 204 204 Sexual and Asexual Reproduction Sexual and Sexual and Asexual Reproduction Sexual and Asexual Reproduction Asexual Reproduction Practice: Practice: Asexual or sexual Asexual or sexual reproduction Activity reproduction Activity Exit: Exit: Explain the difference between sexual and asexual reproduction. 3/20/2015 3/20/2015 Application: Application: Glue notes here Glue notes here Connection: Connection: Ws
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3/20/20153/20/2015
Starter:Starter:
Quiz
202202 204204 Sexual and Asexual Reproduction Sexual and Asexual Sexual and Asexual Reproduction Sexual and Asexual Reproduction Reproduction
Practice:Practice: Asexual or sexual reproduction Asexual or sexual reproduction Activity Activity
Exit:Exit:Explain the difference between sexual and asexual reproduction.
3/20/20153/20/2015Application:Application:
Glue notes hereGlue notes here
Connection: Connection:
Ws
March 20, 2015
AGENDA
TEKS 7.14B
compare the results of uniform
or diverse offspring from
sexual reproduction or
asexual reproduction
1. Quiz2. Activity3. Ws4. Exit
DateDate Lecture/ Activity/ Lab Lecture/ Activity/ Lab Page Page3/18 Probability lab 199-2003/18 Probability lab 199-2003/19 Monster Genetics 201-2023/19 Monster Genetics 201-202
Reproduction: Reproduction: Asexual vs. Asexual vs.
SexualSexual
TEKS 7.14B compare the results of uniform or divers offspring from sexual reproduction
or asexual reproduction
ReproductionReproduction is important for the survival of all living speciesspecies.
Without a way to reproduce, lifelife would come to an endend.
There are two types of
reproduction, asexual & sexual.
Sexual reproducti
on
Sexual reproduction
involves fertilization
so it typically requires the sex cells of
twotwo parents.
Advantages of Sexual
Reproduction:The offspring will be different from its parents.
Advantages of Sexual
Reproduction:Genetic variation allows the species
to adapt to its surroundings.
Advantages of Sexual
Reproduction:“Good” traits are passed on
and strengthen the species which increases their survival rate.
Advantages of Sexual
Reproduction:The fertilized
egg can sometimes survive in adverse
conditions.
Requires two sets of sex cells (egg and sperm) usually produced by twotwo parents that must get together to mate.
Disadvantages of Sexual
Reproduction:
Often slower, more complexcomplex & less less reliable reliable than asexual reproduction.
Disadvantages of Sexual
Reproduction:
Most animals reproduce sexually. (fly, human, snake,
frog)
Examples of Sexual
Reproduction:
All flowering plants and those that make seeds
reproduce sexually. (daffodil, grass, rose, oak
tree).
Examples of Sexual Reproduction:
Fertilization may be internal
(mammals, birds, reptiles) or
external (frogs, fish).
Examples of Sexual Reproduction:
Asexual Reproducti
on
Asexual reproduction involves oneone parent & results in an exactexact duplicate of an organism.
Usually faster and easiereasier, so a new plant or animal can colonize an area more quicklyquickly.
Advantages of Asexual
Reproduction:
A matemate does not have to be found so no travel is involved which saves energyenergy.
Advantages of Asexual
Reproduction:
Less complex and more reliable.
Advantages of Asexual
Reproduction:
Can produce a large number of offspringoffspring very quicklyquickly.
Advantages of Asexual
Reproduction:
The new organisms are genetically identicalidentical to their parent and each other.
Disadvantages of Asexual
Reproduction:
Adaptation does not occur.
Disadvantages of Asexual
Reproduction:
Organisms with no
variationvariation that cannot adapt may become
extinctextinct.
Disadvantages of Asexual
Reproduction:
Examples of Examples of Asexual Asexual
Reproduction:Reproduction:Plants and fungi Plants and fungi that make that make sporesspores (mosses, ferns, (mosses, ferns,
mold, mold, mushrooms) mushrooms)
SporesSpores
Single cells, which Single cells, which reproduce by reproduce by
binary fission or binary fission or splittingsplitting in two in two
(amoeba, (amoeba, bacteria).bacteria).
Examples of Examples of Asexual Asexual
Reproduction:Reproduction:
Binary Binary fissionfission
BuddingBudding: Spider : Spider plants and hydras plants and hydras
form new organisms form new organisms when when part of the part of the
parent breaks off to parent breaks off to form a daughter cell form a daughter cell
that grows into a new that grows into a new individual that is individual that is identical to the identical to the
parent.parent.
BuddingBudding
RunnersRunners: Grass and : Grass and strawberries can form strawberries can form horizontal stems that horizontal stems that grow on top of or just grow on top of or just
below the ground below the ground which can produce which can produce
new plants new plants horizontally at nodes horizontally at nodes
or tips along the or tips along the stem.stem.
RunnerRunnerss
FragmentationFragmentation: : Some plants, Some plants, planarian and planarian and
other worms can other worms can be be split into many split into many
fragments that fragments that each grow into new each grow into new
identical identical individuals.individuals.
FragmentatiFragmentationon
RegenerationRegeneration: : Type of Type of
fragmentation in fragmentation in which starfish, which starfish,
lizards & lizards & sponges can sponges can
grow back body grow back body parts that are parts that are
damaged or lost.damaged or lost.
3/20/20153/20/2015
Starter:Starter:
Quiz
202202 204204 Sexual and Asexual Reproduction Sexual and Asexual Sexual and Asexual Reproduction Sexual and Asexual Reproduction Reproduction
Practice:Practice: Asexual or sexual reproduction Asexual or sexual reproduction Activity Activity
Exit:Exit:Explain the difference between sexual and asexual reproduction.
3/20/20153/20/2015Application:Application:
Glue notes hereGlue notes here
Connection: Connection:
Ws
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