Transcript Asexual vs. Sexual Reproduction

Binary Fission
How single cell organisms reproduce
This process is sometimes referred to as
“cell division”, where one cell turns into
two identical cells
The cell uses mitosis in order to replicate
its DNA and splits.
THE CELLS ARE IDENTICAL
Happens quickly… and does not take a lot of
energy
Binary Fission
Fragmentation/ regeneration
Moss
Budding
Asexual
Offspring grows out
of parent
Yeast, hydras
+ Fast, somewhat
easy
- No variation
Pollination
Sexual
Pollen is delivered to
female part of plant
Flowering plants
+ Plants don’t have
to move, mixes DNA
to provide variation
- Need external
source for pollination
to take place; wind,
bee, bat, butterfly
etc.
Pollination
Sexual Reproduction
Sexual
DNA from 2
individuals merge to
form one
Animals, Plants
+ Diverse DNA
(variation in species)
- Takes a long time,
2 individuals needed
Asexual vs. Sexual Reproduction
Please copy this chart in your Comp. book – use the WHOLE left page.
Name
1. Binary Fission
2. Fragmentation/
Regeneration
3. Budding
4. Pollination
5. Sexual
Reproduction
Type
(asexual
What
Organisms
or
happens? that use
sexual)
this type
Single cell organisms:
Bacteria
Protists
Amoeba
+
Positives
Asexual
One cell divides
into two identical
parts.
Asexual
Organism can
regenerate lost
parts. Fragments
of an organism can
be formed into an
entire new organism
Regenerate:
Lizards, Starfish
+Occurs Quickly
Skin cells, salamander. +Passes on Strong traits
Fragmentation:
Plant cuttings
Potato Tubers
Asexual
Small identical ‘buds’
are formed along the
outer edge of an
Organism, eventually
grow into a new one
Corals
Hydra
Sea Anemone
Yeast
Sexual
Pollen from one plant
fertilizes another
upon contact to
produce seeds
Sexual
Sperm from male
fertilizes egg from
female to form the
zygote
Flowering plants
That produce fruit
Or seeds
Most animals
Humans
Negatives
-Passes weak traits to
+Occurs Quickly
all identical offspring.
+Passes on Strong traits
-May be wiped out if
Environment changes
-Passes weak traits to
all identical offspring.
-May be wiped out if
Environment changes
+Occurs Quickly
-Passes weak traits to
+Passes on Strong traits all identical offspring.
-May be wiped out if
Environment changes
-Takes a long time to
+Provides variation
Get the next generation
In the species to ensure
-Relies on outside
Survival during
factors for pollination
Environmental change
-Takes a long time to
+Provides variation
Get the next generation
In the species to ensure
-Detrimental traits may
Survival during
Be passed on to
Environmental change
Offspring
Asexual vs. Sexual Reproduction
Please copy this chart in your Comp. book – use the WHOLE left page.
Name
1. Binary Fission
2. Fragmentation/
Regeneration
3. Budding
4. Pollination
5. Sexual
Reproduction
Type
(asexual
What
Organisms
or
happens? that use
sexual)
this type
+
Positives
Negatives
Asexual vs Sexual Reproduction
QUIZ
1. During Binary Fission, a single celled organism will
reproduce ______________.
A. asexually by re-growing a lost part
B. asexually by dividing into two cells that are
identical
itself
C. asexually by growing another cell out of
D. sexually by diving into two cells that are
Asexual vs Sexual Reproduction
QUIZ
2. During budding, a hydra will reproduce
__________.
A. asexually by re-growing a lost part
B. asexually by dividing into two cells that are
identical
C. sexually by growing offspring out of itself
D. asexually by growing offspring out of itself
Asexual vs Sexual Reproduction
QUIZ
3. After budding is completed by yeast, the
offspring produced is ____________.
A. a combination of the male and female
parents
B. genetically different than its parent
C. genetically identical to its parent
D. genetically identical to the male and female
parents
Asexual vs Sexual Reproduction
QUIZ
4. A positive of sexual reproduction is that it
____________.
A. Provides genetic variation in the species to
help it to survive a changing environment
B. is quick and easy
C. doesn’t take a lot of energy
D. does not pass on harmful traits to the
offspring
Asexual vs Sexual Reproduction
QUIZ
5. Which of the following statements are true about
asexual reproduction.
A. The parent passes all of its strong traits to
its offspring
B. The parent passes all of its negative traits
to its offspring
C. It doesn’t take a lot of energy
D. All of the above