Reproduction is Types of Reproduction -...
Transcript of Reproduction is Types of Reproduction -...
ReproductionIn living things…
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• when living things produce an offspring.
What is Reproduction?Reproduction in living things…
Reproduction is…
Types of Reproduction• Asexual • Requires one parent • Simplest form of reproduction • Produces a clone of the parent
• Sexual • Requires two organisms • Male and Female
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Asexual ReproductionReproduction in living things…
Let’s watch…
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• The young grows out of the body of the parent
Asexual ReproductionReproduction in living things…
Budding
Watch and observe
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• The body of the parent breaks into pieces
Asexual ReproductionReproduction in living things…
Fragmentation
Watch and observe
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• A part of the parent is detached from the rest of its body.
Asexual ReproductionReproduction in living things…
Regeneration
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Asexual ReproductionReproduction in living things…
Regeneration
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Asexual ReproductionReproduction in living things…
Fragmentation VS Regeneration
Fragmentation Regeneration
Occurs in multi-cellular organisms with simple
body organization
Occurs in fully differentiated multi-cellular organisms with complex
body organization
An organism breaks into pieces and each piece develops into a
new individual.
An organism breaks into pieces and each piece
may or may not develop into a new individual.
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• A parent releases a special mass of cells
Asexual ReproductionReproduction in living things…
Formation of Internal Buds
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Asexual ReproductionReproduction in living things…
Formation of Internal Buds
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Sexual ReproductionReproduction in living things…
Let’s watch…
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• When the sperm cell fuses with the egg cell • These are called gamete cells
Sexual ReproductionReproduction in living things…
It all starts with fertilization
Kinds of Fertilization
• External Fertilization • Eggs are fertilized outside the female body.
• Internal Fertilization • Eggs are fertilized inside the female body.
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Sexual ReproductionReproduction in living things…
When does a human life begin?
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• When the sperm cell reaches the egg cell
Sexual ReproductionReproduction in living things…
When does a human life begin?
And then…
• A series of cell division happens • The fertilized egg attaches to the womb of the
mother • The uterus becomes bigger to accommodate
the baby for 9 months • The developing embryo gets nutrients through
the umbilical cord
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Sexual ReproductionReproduction in living things…
When does a human life begin?
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Sexual ReproductionReproduction in living things…
When does a human life begin?
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