Download Reproduction: Asexual vs

TEKS 7.14B compare the results of uniform or divers offspring from sexual reproduction or asexual reproduction
Reproduction: Asexual vs. Sexual
Reproduction is important for the survival of all living species. Without a
way to reproduce, life would come to an end. There are two types of reproduction,
asexual and sexual.
Comparing sexual with asexual reproduction:
Sexual
Asexual
 Sexual reproduction involves
fertilization so it typically requires
the sex cells of two parents.
 Asexual reproduction involves one
parent and results in an exact
duplicate of an organism.
Advantages
 The offspring will be different from
its parents.
 Genetic variation allows the species
to adapt to its surroundings.
 “Good” traits are passed on and
strengthen the species which
increases their survival rate.
 The fertilized egg can sometimes
survive in adverse conditions.
 Usually faster and easier, so a
new plant or animal can colonize
an area more quickly.
 A mate does not have to be found
so no travel is involved which
saves energy.
 Less complex and more reliable.
 Can produce a large number of
offspring very quickly.
Disadvantages
 Requires two sets of sex cells (egg
and sperm) usually produced by two
parents that must get together to
mate.
 Often slower, more complex, and
less reliable that asexual
reproduction.
 The new organisms are genetically
identical to their parent and each
other.
 Adaptation does not occur.
 Organisms with no variation that
cannot adapt may become
extinct.
Examples
 Most animals reproduce sexually
(fly, human, snake, frog).
 All flowering plants and those that
make seeds reproduce sexually.
(daffodil, grass, rose, oak tree).
 Fertilization may be internal
(mammals, birds, reptiles) or
external (frogs, fish).
 Plants and fungi that make spores
(moss, ferns, mold, mushrooms).
 Single cells, which reproduce by
binary fission or splitting in two
(amoeba, bacteria).
 Budding (spider plant, hydra).
 Runners (grass, strawberries).
 Fragmentation (planarians).
 Regeneration (starfish).
Definition
TEKS 7.14B compare the results of uniform or divers offspring from sexual reproduction or asexual reproduction
Reproduction: Asexual vs. Sexual
____________________ is important for the survival of all living _______________.
Without a way to reproduce, __________ would come to an _________. There are two
types of reproduction, _______________and _______________.
Comparing sexual with asexual reproduction:
Sexual
 Sexual reproduction involves
Definition
parent and results in an ___________
requires the sex cells of ______ parents.
duplicate of an organism.
from its parents.
 Genetic ___________ allows the species
to ____________ to its surroundings.
 “Good” traits are passed on and
strengthen the species which increases
their _______________ __________.
 The fertilized egg can sometimes
_______________ in adverse conditions.
 Requires _____ sets of sex cells (egg and
Disadvantages
 Asexual reproduction involves ______
____________________ so it typically
 The offspring will be _______________
Advantages
Asexual
 Usually faster and _______________,
so a new plant or animal can colonize
an area more _______________.
 A __________ does not have to be
found so no travel is involved which
saves _______________.
 Less _______________ and more
_______________.
 Can produce a large number of
_______________ very quickly.
 The new organisms are genetically
sperm) usually produced by two parents
_______________ to their parent and
that must get together to
each other.
_______________.
 Often _______________, more
 _______________ does not occur.
 Organisms with no _______________
_______________, and less reliable that
that cannot adapt may become
asexual reproduction.
_______________.
 Plants and fungi that make
 Most _______________ reproduce
sexually (fly, human, snake, frog).
 All _______________ plants and those
Examples
that make _______________ reproduce
sexually. (daffodil, grass, rose, oak tree).
 Fertilization may be _______________
(mammals, birds, reptiles) or
_______________ (frogs, fish).
_______________ (moss, ferns, mold,
mushrooms).
 _______________ cells, which
reproduce by binary fission or
_______________ in two (amoeba,
bacteria).
 Budding (spider plant, hydra).
 Runners (grass, strawberries).
 Fragmentation (planarians).
 Regeneration (starfish).