Download Sexual and Asexual Reproduction

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
Definition
Advantages
 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.
 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.
 Requires two sets of sex cells
(egg and sperm) usually
produced by two parents that
must get together to mate.
Disadvantages
 Often slower, more complex,
and less reliable that asexual
reproduction.
Examples
Asexual
 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).
 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.
 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).
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
____________________ so it
typically requires the sex cells of
______ parents.
Asexual
 Asexual reproduction involves ______
parent and results in an ___________
duplicate of an organism.
 The offspring will be
_______________ from its parents.
 Genetic ___________ allows the
species to ____________ to its
surroundings.
Advantages
 “Good” traits are passed on and
strengthen the species which
increases their _______________
__________.
 The fertilized egg can sometimes
_______________ in adverse
 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.
conditions.
 Requires _____ sets of sex cells (egg
Disadvantages
and sperm) usually produced by two
_______________ to their parent and
parents that must get together to
each other.
_______________.
 Often _______________, more
 _______________ does not occur.
 Organisms with no _______________
_______________, and less reliable
that cannot adapt may become
that asexual reproduction.
_______________.
 Most _______________ reproduce
sexually (fly, human, snake, frog).
 All _______________ plants and
Examples
 The new organisms are genetically
 Plants and fungi that make
_______________ (moss, ferns, mold,
mushrooms).
those that make _______________
 _______________ cells, which reproduce
reproduce sexually. (daffodil, grass,
by binary fission or _______________ in
rose, oak tree).
two (amoeba, bacteria).
 Fertilization may be
 Budding (spider plant, hydra).
_______________ (mammals, birds,
 Runners (grass, strawberries).
reptiles) or _______________ (frogs,
 Fragmentation (planarians).
fish).
 Regeneration (starfish).
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
____________________ so it
typically requires the sex cells of
______ parents.
Asexual
 Asexual reproduction involves ______
parent and results in an ___________
duplicate of an organism.
 The offspring will be
_______________ from its parents.
 Genetic ___________ allows the
species to ____________ to its
surroundings.
Advantages
 “Good” traits are passed on and
strengthen the species which
increases their _______________
__________.
 The fertilized egg can sometimes
_______________ in adverse
 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.
conditions.
 Requires _____ sets of sex cells (egg
Disadvantages
and sperm) usually produced by two
_______________ to their parent and each
parents that must get together to
other.
_______________.
 Often _______________, more
 _______________ does not occur.
 Organisms with no _______________ that
_______________, and less reliable
cannot adapt may become
that asexual reproduction.
_______________.
 Most _______________ reproduce
sexually (fly, human, snake, frog).
 All _______________ plants and
Examples
 The new organisms are genetically
 Plants and fungi that make
_______________ (moss, ferns, mold,
mushrooms).
those that make _______________
 _______________ cells, which reproduce
reproduce sexually. (daffodil, grass,
by binary fission or _______________ in
rose, oak tree).
two (amoeba, bacteria).
 Fertilization may be
 Budding (spider plant, hydra).
_______________ (mammals, birds,
 Runners (grass, strawberries).
reptiles) or _______________ (frogs,
 Fragmentation (planarians).
fish).
 Regeneration (starfish).