Download Unit 3_Lesson 80_Asexual Sexual

Name ___________________________
Date: ___________________
Course: Science/Ms. Lopez
80a
Homeroom:
Aims: SWBAT compare and contrast asexual and sexual reproduction
SWBAT to list two advantages and two disadvantages for each type of reproduction
Essential Question: Which type of reproduction is most beneficial to have?
Do Now
1) How is a clone child born from asexual reproduction different from a child born from
sexual reproduction?
A. There is no difference
B. A clone child has a different genetic make-up from its parent while a child born
from sexual reproduction has the same genetic make-up from its parent.
C. A clone child has the same genetic make-up from its parent and a child born from
sexual reproduction has the same genetic make-up from its parent.
D. A clone child has the same genetic make-up from its parent while a child born from
sexual reproduction has different genetic make-up from its parent.
2) All of these are an example of asexual reproduction except:
A. A sea star regenerating a new arm
B. A mother dog giving birth
C. A potato sprouting new plants from its buds
D. A strawberry plant forming new plants with runners
3) Fern A has a chromosome that makes its leaves rough. Fern B has a
chromosome that makes its leaves smooth. Fern A’s spore is planted in some
soil and a new fern grows. Will the leaves of the new plant be smooth or rough?
How do you know?
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Shrimp cell: 86 chromosomes
Sheep: 54 chromosomes
Mosquito: 6 chromosomes
Female gamete: ___________
Male gamete: ___________
Female gamete: ___________
STOP!
Advantages of Asexual Reproduction
Asexual reproduction can be very advantageous to certain animals. For
instance, animals that remain in one particular place and are unable to look for mates
would need to reproduce asexually.
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2
NONE
Another advantage of asexual reproduction is that numerous offspring can be
produced without "costing" the parent a great amount of energy or time. Environments
that are stable and experience very little change are the best places for organisms that
reproduce asexually. The cloned offspring are more likely to succeed in the same stable
areas as their parents.
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2
NONE
Asexual reproduction can create individuals rapidly and in large
quantities. Secondly, bypassing the sexual process can help a plant in times of dryness
since motile sperm require water to fertilize the egg. Another advantage lies in the fact
that plants with the desired characteristics can be cloned for economic reasons
(agriculture). Overall, asexual reproduction seems to be favored when rapid population
growth is needed, and sexual reproduction is favored under changing conditions.
List 3 advantages to asexual reproduction
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2
NONE
1.) _________________________________________________________________________
2.) __________________________________________________________________________
3.) _________________________________________________________________________
Which advantage do you think is the most important? Why? _____________________
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Disadvantages of Asexual Reproduction
Although a sexless existence can have these advantages, it's generally a dangerous
lifestyle, which carries a greater risk of extinction. Environmental changes are less hazardous
to species that have sex.
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2
NONE
By mixing some momma chromosomes with some poppa chromosomes, sexual reproduction
shuffles genes around, making individuals of a species more varied. A sexual species will be
more resilient in a changing environment, because a few of their members might randomly have
the right traits to survive.
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2
NONE
If each ant is exactly the same, adverse conditions, such as a new bacterial infection, could
easily wipe them all out. If something goes wrong, such as the occurrence of a fatal mutation,
the whole society of clones can be terminated.
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2
NONE
List 3 disadvantages to asexual reproduction
1.) ________________________________________________________________________
2.) __________________________________________________________________________
3.) _________________________________________________________________________
Summary – ASEXUAL REPRODUCTION
Advantages
Disadvantages
1.) ______________________________ 1.) ______________________________
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2.) ______________________________
2.) ______________________________
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3.) ______________________________
3.) ______________________________
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Advantages of Sexual Reproduction
Benefits of sexual reproduction revolve around increased genetic diversity. This
increased diversity is good when conditions change and a population needs new combinations
of genes to do well under the new conditions; when predators or competitors are evolving
rapidly and the new gene combinations may help the population "keep up", and when the
population is threatened with disease. In the latter case, at least some members of a genetically
diverse population will be able to resist the
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2
3
NONE
disease.
List 3 advantages to sexual reproduction
1.) ________________________________________________________________________
2.) __________________________________________________________________________
3.) _________________________________________________________________________
Disadvantages of Sexual Reproduction
1.) The need to find a mate (hard to do for sessile organisms or organisms with low population
densities; 2. the time and energy required to find a mate and to copulate (this is time that could
be spent eating or acquiring resources); 3. the exposure to predation (sometimes from the mate!)
that comes with mating; 4. exposure to disease from the mate; 5. when an animal mates, only
1/2 of its genes go into each of the offspring, so the genes are "diluted"; 6. because some
proportion of the population is male, not all adult organisms are directly producing offspring,
thus lowering the rate of population growth; and 7. adaptive combinations of genes are lost.
List 3 disadvantages to sexual reproduction
1.) _________________________________________________________________________
2.) __________________________________________________________________________
3.) _________________________________________________________________________
Summary – SEXUAL REPRODUCTION
Advantages
Disadvantages
1.) ______________________________
1.) ______________________________
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2.) ______________________________
2.) ______________________________
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3.) ______________________________
3.) ______________________________
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INDEPENDENT PRACTICE
1. By what process do starfish grow back lost arms?
A. Budding
B. Regeneration
C. Binary fission
2. Why are the offspring of asexual reproduction called clones?
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29. The following table describes one method each organism can use to reproduce.
Methods of Reproduction
3.
Organism
Description
Jellyfish
A part of the parent breaks off and
becomes a new jellyfish.
Komodo dragon
A female produces eggs that
develop into young without a male.
Swordtail fish
A female lays eggs that were
fertilized by a male.
Bacterium
The single-celled organism splits
into two cells that are identical.
Which organism reproduces sexually?
A. Jellyfish
B. Komodo dragon
C. Swordtail fish
D. Bacterium
TURN PAGE 
4.
5.) A student observes a unicellular organism under a microscope. After a while, the organism begins to
split into two cells, as shown in the diagram.
Which of these best describes the process shown in the diagram?
A. binary fission
B. meiosis
C. osmosis
D. sexual reproduction
TURN PAGE 
from
atmosphere falls into the
B. the
cloning
stream.
1
C. sexual reproduction
C.
The stream water absorbs minerals
D. asexual reproduction
from
the plants growing in it and
along its banks.
D.
When water evaporates from the
ocean, it takes minerals with it and
redeposits them as rainwater into
the stream.
CCS-043A
3.
SPEED
(in meters/secon
3.0
2.5
2.0
bears are genetically different from each other and from their parents. These genetic differences
A.2.) Polar
Rainwater
dissolves minerals out of
1.5
are the result of
the rocks and soil during runoff.
1.0
A. mitosis
0.5
B. Rainwater
that is high in minerals
0
minerals get into stream water?
3
4
14.
asexually. One way to see if a given
paramecium is the product of sexual or
asexual reproduction is to
A.
see whether its genes are identical
to those of its parent.
B.
check for traits that are beneficial to
its survival.
C.
check for traits that are not beneficial
to its survival.
D.
test it for acquired characteristics.
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7
8
The graph shown above provides
information about the motion of a bicy
When is the bicycle’s acceleration the
greatest?
Paramecia reproduce both sexually and
5
TIME
(in seconds)
A.
at 0 seconds only
B.
from 0 – 3 seconds
C.
from 3 – 8 seconds
D.
from 8 – 9 seconds
8SPPPF-026D
CCD-105A
2
Name ___________________________
Course: Science/Ms. Lopez
Date: ___________________
80c
Homeroom:
Homework #80 – Due tomorrow
In the picture above, there are 5 male deer and 100 female deer.
Using the picture and the caption describing the picture above, write 4-6 sentences answering the following:
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•
•
•
Pretend- If you could decide how deer reproduced, what would you recommend for this odd deer
population with five male deer and 100 female deer? (Sexual or Asexual reproduction)
Explain your answer to the first bullet point
What is an advantage of sexual reproduction
Which reproduction would you choose if instead the population of deer was 100 male and 100 female
(Sexual or Asexual reproduction)
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Check your work.
____Did you capitalize the beginning of every sentence and all proper nouns?
____Did you spell every word correctly that is spelled correctly on the page?
____Did you punctuate the end of every sentence?
____Did you write in complete sentences? (Subject, predicate, and complete
thought).
TURN PAGE 
Name ___________________________
Date: ___________________
Course:
Science/Ms.
Lopez
Homeroom:
42. Aaron
is classifying
the following organisms into
animal groups.
80b
S
TURN PAGE 
Exit Slip #80
Asexual Reproduction
Sexual Reproduction
Advantage
Advantage
1.) _______________________________________
2.) _______________________________________
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Gila Monster
Which reasons can Aaron give for
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Gila monster as a reptile?
Frog
classifying
the frog as an amphibian and the
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Disadvantage
F.
Disadvantage
H.
3.) _______________________________________
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4.) _______________________________________
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t 5IF(JMBNPOTUFSMJWFTPO
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land.
G.
J.
5.) Which explanation
below do you think describes an advantagetto5IFGSPHMBZTFHHT
sexual reproduction?
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t 5IF(JMBNPOTUFSIBT
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a. Sexually reproducing
organisms can create new organisms with t
new
traits.
scales.
blooded.
b. Sexually reproducing organisms can carry diseases to new organisms
c. Sexually reproducing organisms can create new organisms with one parent
d. Sexually reproducing organisms can have the same exact genes as parent
43. Which statement describes asexual and sexual reproduction?
6.)
A. "TFYVBMJTPOFQBSUPGTFYVBMSFQSPEVDUJPO
B. 4FYVBMSFQSPEVDUJPOIBQQFOTCFGPSFBTFYVBM
C. "TFYVBMOFFETPOFQBSFOUBOETFYVBMOFFETUXPQBSFOUT
D. 4FYVBMIBQQFOTPOMZJOBOJNBMTBOEBTFYVBMIBQQFOTPOMZJOQMBOUT
7) How are the offspring of organisms that produce A-Sexually different than those that
reproduce sexually?
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