Transcript Reproduction

Reproduction
Can you guess whether the
following organisms reproduce
using sexual or asexual
reproduction?
Rats
Sexual reproduction (internal)
• Rats reproduce
through internal
sexual reproduction,
which means that the
egg is fertilized by the
sperm inside of the
female.
Mosquitoes
Sexual reproduction
• Mosquitoes feed on
nectar, but female
mosquitoes need the
iron from your blood
to produce eggs,
which the male then
fertilizes.
• Most things that
produces eggs
reproduce through
sexual reproduction.
hydra
Asexual Reproduction
• Hydras reproduce
asexually through a
process called
“budding.”
• Budding is when a
small part of the
parents body
becomes a new
individual.
Bacteria
Asexual reproduction
• Bacteria reproduce
asexually.
• Bacteria are all single
celled, so they simply
divide in half using
mitosis.
• Movie
Plant cuttings
Asexual reproduction
• Many plants can be
“shared” by cutting off
pieces and replanting
them somewhere
else.
Salmon
Sexual reproduction (external)
• Salmon reproduce
through sexual
reproduction, but
fertilization occurs
outside of the females
body.
• The female deposits
her eggs and the
male deposits his
sperm, and
fertilizations occurs in
the water.
Mold
Asexual reproduction
• Mold reproduces
asexually by forming
spores that grow into
new, genetically
identical mold
colonies.
sunflowers
Sexual reproduction
• Almost all flowering
plants reproduce
sexually.
• Pollen is the sperm
and the egg is deep
inside of the flower.
• Insects help pass
pollen from one plant
to another, but some
flowers can also selffertilize.
Planaria
Asexual
• Planaria reproduce
asexually through a
process called
fragmentation.
• If a planaria is cut in
half, a new one will
grow from each half.
• Starfish can also
reproduce this way.
Potato
Both!
• A potato can
reproduce sexually or
asexually.
• So can strawberries.
amoeba
Asexual reproduction
• Amoeba reproduce
asexually using
mitosis.
• When a single cell
divided using mitosis,
it is called binary
fission.
butterfly
Sexual Reproduction
• Remember: If there
are eggs involved,
then it’s sexual
reproduction
Review: Asexual reproduction
• Asexual reproduction:
– Has only 1 parent
– Uses mitosis
– Produces offspring
that are genetically
identical to their
parent.
Review: Sexual reproduction
• Sexual reproduction:
– Has 2 parents
– Involves an egg
– Has males and
females
– Uses meiosis
– Produces offspring
that are genetically
different than the
parents.