Transcript Phenotypic Distribution of Polygenic Traits and Allele

Phenotypic Distribution of Polygenic
Traits and Allele Frequency for
Introductory Biology
John Brady and Travis Curry
Brebeuf Jesuit Preparatory School
Indianapolis IN
Website:
Phenotypic Distribution of Polygenic
Traits
• Phenotype- Observable Traits
• Examples:
• Polygenic Trait- phenotype is dependent on
alleles at many different genes
• Examples:
Why Garlic Mustard?
• Abundant on campus
• Invasive species
• Relates to other
content like
populations,
competition,
biodiversity,
evolution.
Environmental Literacy
“…the capacity of an individual to act
successfully in daily life on a broad
understanding of how people and
societies relate to each other and to
natural systems, and how they might
do so sustainably.”
http://www.fundee.org/facts/envlit/whatisenvlit.htm
Height of Garlic Mustard Plants Collected at Brebeuf
Jesuit Preparatory School, Demonstrating Normal
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Distribution
N
u
m
b
e
r
14
12
o
f
G
a
r
l
i
c
M
u
s
t
a
r
d
10
P
l
a
n
t
s
Series1
Poly. (Series1)
8
6
4
2
0
0
20
40
60
80
100
120
Height of Garlic Mustard Plants (cm)
140
160
180
Oh Deer: Allele Frequency “Mate or
Die”
Background
• Project Wild “Oh Deer” activity : used to
demonstrate competition for scarce resources
limiting populations: Project Wild
• Illustration of variation leading to differential
fitness success in a wild population
• Just add some alleles and mating and it is easy
to demonstrate directional and stabilizing
selection in a population.
Figure 1: Allelic frequency for the dominant "hobbling"
mutation (N) and the recessive "normal" mutation (n) over
nine generations of "Mate or Die"
0.8
0.7
Allele Frequency
0.6
0.5
0.4
Frequency N
Frequency n
0.3
0.2
0.1
0
0
1
2
3
4
5
6
Generations of "deer" Population
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8
9
Thank You!
• John Brady: [email protected]
• Travis Curry: [email protected]
• Website: http://tcurry1977.edublogs.org/