Download Asexual & Sexual Reproduction

Asexual
&
Sexual
Reproduction
Asexual Reproduction


Type of reproduction in which a
new organism is produced from
ONE parent and the offspring is
identical to the parent.
Occurs in most plants, bacteria,
protists, and low invertebrates.
Asexual Reproduction


One parent
Offspring
are identical
to the parents.
One Parent
Identical
Offspring
Asexual Reproduction

Advantages and Disadvantages of
Asexual Reproduction


Advantages – Identical to parent,
so will get all good characteristics.
Disadvantages – Identical to parent,
so will also get bad characteristics
and is less able to adapt to the
environment.
Asexual Reproduction

Types of Asexual Reproduction

Binary Fission – used by
bacteria, an organism
whose cells do not
contain a nucleus copy
then divide into two
identical organisms

Example: bacteria
Asexual Reproduction

Types of Asexual Reproduction

Budding – organism that produces a bud
that breaks away to live on its own.

Example: hydra
Asexual Reproduction

Types of Asexual Reproduction

Vegetative Propagation – results in a new
plant that is genetically identical to the
parent plant (a clone).

Examples: strawberry plant, vegetables,
and crops.
Asexual Reproduction
Types of Asexual Reproduction
Sporulation – organism forms spores as a
means of asexual reproduction
Examples: bread mold, mushrooms
Asexual Reproduction

Types of Asexual Reproduction

Regeneration – organism uses cell
division to re-grow body parts.

Example: starfish, salamander
Salamanders: Salamanders can regenerate legs. When a salamander is in the
larval stage, it can regenerate a limb in thirty to forty days! Adult salamanders
can also regenerate limbs, but it takes much longer and the leg is not as large
as the original one.
Lizards: Lizards have the ability to replace lost limbs or a
lost tail. This is important because when a predator such as
a hawk captures the tail, the lizard can escape. The new
tail lacks the backbone of the original tail.
Crayfish: Cray fish can regrow claws, pinchers, or legs. It
is easy to recognize the regenerated part because it is
smaller than the other parts. Just like the lizard, it can
break off a claw or leg so that it can escape when captured
by a predator.
Sexual Reproduction


Two parents
Two
Offspring are
Parents
a combination
of both parents
unique / diverse offspring
and are
therefore different
from each parent.
Sexual Reproduction

Advantages and Disadvantages of
Asexual Reproduction


Advantages – variety and/or diversity
of offspring (color, shape, size,
intelligence, ability, etc.), More able to
adapt to environmental changes.
Disadvantages – uniqueness,
sometimes traits needed for survival
are not passed on.
Sexual Reproduction

Types of Sexual Reproduction

Plants – when the reproductive cells
of one plant fertilize
(pollinate) the
reproductive cells
of another plant. This produces
seeds that can grow
into a new plant.
Sexual Reproduction

Types of Sexual Reproduction.

Animals – when the reproductive
cells of one
animal fertilize
the reproductive cells of another
animal. This
produces a
baby (embryo).