Download Unit Plan Part 1

Sarah Verdun
2/29/12
BSC 307
Part 1: Textbook Concept list
Unit Plan Template (Part 1)
Concept
Darwin’s theory of evolution
Evolution is a change in the relative frequency of alleles in a
population
Two main sources of genetic variation: mutations and genetic
shuffling as a result of sexual reproduction
The number of phenotypes for a trait depends on the number of genes
that control the trait.
Natural selection can cause a change in allele frequencies. The result
is evolution.
Directional selection, stabilizing selection, and disruptive selection are
three ways natural selection can affect phenotype distributions.
Genetic drift
Hardy-Weinberg principle
As new species evolve, populations become reproductively isolated
from each other.
Mechanisms of speciation in the Galapagos finches
Part 2: Illinois Learning Standards Concept List
Concept
Definitely, Maybe, or Don’t Include?
Definitely
Definitely
Definitely
Maybe
Definitely
Definitely
Definitely
Definitely
Definitely
Maybe
Descriptor
Definitely, Maybe, or Don’t
Include?
Darwin’s theory of evolution
Evolution is a change in the relative frequency of alleles
in a population
Two main sources of genetic variation: mutations and
genetic shuffling as a result of sexual reproduction
The number of phenotypes for a trait depends on the
number of genes that control the trait.
Natural selection can cause a change in allele
frequencies. The result is evolution.
Directional selection, stabilizing selection, and
disruptive selection are three ways natural selection
can affect phenotype distributions.
Genetic drift
Hardy-Weinberg principle
As new species evolve, populations become
reproductively isolated from each other.
Mechanisms of speciation in the Galapagos finches
Stage H 12.A.3
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Definitely
Definitely
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Definitely
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Maybe
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Definitely
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Definitely
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Definitely
Definitely
Definitely
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Maybe
Use the table below to complete part 3 of your Unit Plan Assignment
Concept
This Unit, Another
Rationale
Related ILS
Darwin’s theory of
evolution
Unit, or Leave Out?
This unit
Evolution is a change in the This unit
relative frequency of alleles
in a population
Two main sources of
genetic variation:
mutations and genetic
shuffling as a result of
sexual reproduction
This unit
The number of phenotypes
for a trait depends on the
number of genes that
control the trait.
Another unit, unless
there was no time,
then this unit
Darwin’s observations showed that change
had happened. His findings introduce the
mechanisms of change and lay the
foundation for the details that will be
explained later in the unit. It belongs in
this unit because he was the first to propose
the mechanism of evolution that is accepted
as true today.
This concept is the basis of the entire unit.
An understanding of this concept is critical
to build off of for future concepts. Students
must have a clear definition of evolution
and this concept provides it within this
unit.
An understanding of the mechanism of
change is necessary to understand the result
of the change, which is evolution. This
concept belongs in this unit because
students need to understand what causes
the changes to take place in the first place.
This concept should be covered in a
previous unit on genetics. By the time
students learn about evolution, they should
already understand how genes control
phenotypes. However, if for some reason
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Natural selection can cause This unit
a change in allele
frequencies. The result is
evolution.
Directional selection,
stabilizing selection, and
disruptive selection are
three ways natural
selection can affect
phenotype distributions.
Genetic drift
This unit
Hardy-Weinberg principle
This unit
As new species evolve,
populations become
This unit
This unit
this concept was left out of that unit, it
should be included in this unit on evolution.
Natural selection belongs in this unit
Stage H 12.A.3
because it is the driving force behind
evolution. These two concepts are
interconnected and it would be difficult or
impossible to teach them independently of
one another.
These concepts belong in this unit because Stage H 12.A.3
they show the possible paths of natural
selection. Understanding these ideas will
help students understand the tangible
results of evolution.
This concept belongs in this unit because it Stage H 12.A.3
introduces another mechanism of evolution.
An understanding of the mechanisms is
essential to understand the outcome of
evolution.
This concept fits into this unit because it
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outlines the conditions in which evolution
does not occur. Knowing this information
helps students understand the conditions
that do cause evolution.
This concept belongs in this unit because it Stage H 12.A.3
describes the end result of evolution, which
reproductively isolated
from each other.
Mechanisms of speciation
in the Galapagos finches
This unit, but leave
out if necessary due
to time constraint
is the creation of new species. It explains
the effects of evolution and outlines its
consequences.
The Galapagos finches are often used as an
example when teaching evolution.
Working through this concept with
students reviews other topics already
covered in this unit. It would be a useful
review if time allows.
Stage H 12.A.3
Use the table below to complete parts 4 & 5 of your Unit Plan Assignment.
Concept
Objective(s) As a result of this unit, students will be able to:
1. Darwin’s theory of evolution
 Describe Darwin’s contribution to science.
2. Evolution is a change in the relative
 Identify indicators of evolution in a population.
frequency of alleles in a population
 Relate allele frequencies to gene pools by explaining what each
term refers to and how they differ from one another.
3. Two main sources of genetic
 Demonstrate an understanding of the two processes that can lead
variation: mutations and genetic
to inherited variation in populations by describing an example of
shuffling as a result of sexual
each type.
reproduction
4. The number of phenotypes for a
 Compare and contrast the range of phenotypes between singletrait depends on the number of genes
gene traits and polygenic traits.
that control the trait.
5. Natural selection can cause a
 List and describe the conditions necessary for natural selection.
change in allele frequencies. The
 Explain how natural selection can affect traits that are controlled
result is evolution.
by a single gene.
 Evaluate the significance of mutations to evolution by explaining
the effects a single mutation in one individual could cause over
time in an ecosystem.
6. Directional selection, stabilizing
 Compare and contrast the three patterns of natural selection.
selection, and disruptive selection are
 Develop an example of one pattern of natural selection by creating
three ways natural selection can affect
a ‘field journal’ of population statistics over time.
phenotype distributions.
7. Genetic drift
 Explain why genetic drift is more likely or more common in small
populations.
8. Hardy-Weinberg principle
9. As new species evolve, populations
become reproductively isolated from
each other.
10. Mechanisms of speciation in the
Galapagos finches
 List and describe the conditions necessary for the Hardy-Weinberg
principle to apply.
 Explain how reproductive isolation relates to the formation of new
species.
 List and describe the isolating mechanisms that played a role in the
speciation of the Galapagos finches.
Use the table below to complete part 6 of your Unit Plan Assignment.
Units Preceding
This One
Genetics
Reasoning
Natural selection is the mechanism
of evolution. Natural selection acts
on phenotypes that are coded for by
genotypes. Students must have the
background knowledge of genes
and how they affect phenotypes
before they can understand the
genetic consequences of selection
based on the traits.
Unit Following
This One
Ecology
Reasoning
After a unit on evolution,
students will have an
understanding of how species
come into existence and go
extinct. This ties into ecology
and the impact the species and
environments have on each other.
Once students understand what
is happening on the genetic level,
it will be easier for them to see
the bigger picture of whole
ecosystems and biomes. They can
also see how one small genetic
mutation can affect an entire
ecosystem over time.