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Warm-Up Asexual and Sexual Reproduction
Lesson Question
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WK2 Words to Know
Fill in this table as you work through the lesson. You may also use the glossary to help you.
a form of asexual reproduction in which offspring grow from the parts of the parent plant
a type of reproduction in which one parent produces offspring that are genetically identical to itself
a form of asexual reproduction in which a parent breaks into parts that may regenerate into offspring
a form of asexual reproduction in which a new organism grows from the body of the parent
a form of asexual reproduction in which the parent cell divides into two genetically identical cells
a form of asexual reproduction in which a parent releases spores that develop into offspring
Lesson Goals
Explore how organisms reproduce.
Examine thedifferent typesof asexualreproduction.
Analyze the process of sexual reproduction.
Compare andcontrast asexual and sexual reproduction.
Identifythe advantages and
of both asexual andsexual reproduction.
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Warm-Up Asexual and Sexual Reproduction
Mitosis and Meiosis
There are some key differences between mitosis and meiosis.
Mitosis Meiosis
Cell divides to form cells Cell divides to form sex cells
Cells are genetically identical Cells are different
Necessary for some forms of asexual reproduction
Necessary for sexual reproduction
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Asexual and Sexual ReproductionInstruction
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Asexual Reproduction
• In asexual reproduction, parent produces the offspring.
• The offspring are genetically identical to the .
• In asexual reproduction, cell division ensures that offspring receive
the correct number of .
Budding
• Budding is a form of reproduction in which offspring
begin as a small bud on the parent.
• Some sponges reproduce by budding.
• is necessary for budding.
• In budding, the new organism is attached to the parent.
• In most cases, the new eventually separates from the parent.
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Fragmentation
• Fragmentation is a form of asexual reproduction in which offspring may
develop from of the parent.
• Some worms, , and sea stars reproduce by fragmentation.
• Some or all of the pieces from the parent’s body can develop into .
• Fragmentation must be followed by regeneration.
Binary Fission
• Binary fission is a form of asexual reproduction
in which a parent cell to form two identical cells.
• such as bacteria reproduce
by binary fission.
• Binary fission begins with replication.
• During binary fission, the cell gets longer, the copied DNA separates, and two identical cells are formed.
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Sporulation
• Sporulation is a form of asexual reproduction in which new organisms
develop from .
• Mushrooms and reproduce by sporulation.
• In sporulation, the parent produces spores.
• Spores are released and divide by mitosis into new organisms.
Vegetative Propagation
• Vegetative propagation is a form of asexual reproduction in which offspring
grow from a plant.
• Vegetative propagation occurs only in
.
• Vegetative propagation can be
or .
Sexual Reproduction
• Sexual reproduction requires two parents in order to produce .
• The offspring are genetically from the parents.
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Asexual and Sexual ReproductionInstruction
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Fertilization
• During fertilization:
• egg and join.
• a is formed.
• The zygote develops into a new organism
through mitosis and cell .
Asexual vs. Sexual Reproduction
Asexual Reproduction Sexual Reproduction
Requires parent Requires parents
The offspring receive all DNA from a single parent.
The offspring receive half of their DNA from each parent.
The offspring have the same
as the parent.
The offspring do not have the same DNA as either parent.
Involves cell division that is similar to mitosis
Involves the joining of sex cells, which
are formed during
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Asexual and Sexual ReproductionInstructionSlide
Advantages and Disadvantages of Asexual and Sexual Reproduction
Asexual Reproduction Sexual Reproduction
Advantages
Requires energy Variation in
Is Less competition for resources
Disadvantages
No variation in DNA Requires energy
More
for resources
Is
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Summary Asexual and Sexual Reproduction
Answer
Review: Key Concepts
• Asexual reproduction:
• requires one parent and results in offspring that have the same DNA.
• includes budding, binary fission, , sporulation, and vegetative reproduction.
• involves division (either through mitosis or a similar process).
• Sexual reproduction:
• requires two parents and results in offspring that receive half their DNA from each parent.
• involves of the egg by the sperm, which are formed
during meiosis.
Lesson Question How do organisms reproduce??
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Summary Asexual and Sexual Reproduction
Review: Key Concepts
Asexual Reproduction Sexual Reproduction
Advantages
Requires less energy Variation in DNA
Is faster competition for
resources
Disadvantages
No variation in DNA Requires more
competition
for resources
Is slower
Use this space to write any questions or thoughts about this lesson.
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