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allele-frequency

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Journal Articles
The American Biology Teacher. 1988; 504220–223 doi: https://doi.org/10.2307/4448713
Published: 01 April 1988
... Multiple Allelic Frequencies in Populations at Equilibrium: Algorithms and Applications Francis Nussbaum, Jr. Population genetics often serves as a bridge between units on Mendelian genetics and neo-Darwinian evolution in the teaching of introductory college biology and advanced high school bi- ology. The...
Journal Articles
The American Biology Teacher. 2010; 72112–15 doi: https://doi.org/10.1525/abt.2010.72.1.4
Published: 01 January 2010
...Andrea D. Plunkett; Lev Y. Yampolsky We propose an experimental model suitable for demonstrating allele frequency change in Drosophila melanogaster populations caused by selection against an easily scorable conditional lethal, namely recessive flightless alleles such as apterous and vestigial...
Journal Articles
The American Biology Teacher. 2019; 819665–667 doi: https://doi.org/10.1525/abt.2019.81.9.665
Published: 01 December 2019
...Keith W. Pecor Genetic drift is an important mechanism in microevolution, but it can be more challenging to understand than other mechanisms (e.g., natural selection). This group project allows students to simulate random changes in allelic frequencies over generational time using a few simple...
Journal Articles
The American Biology Teacher. 2019; 815366–371 doi: https://doi.org/10.1525/abt.2019.81.5.366
Published: 01 May 2019
... calculations are required for proper application. Third, the principle, assumptions, and calculations are often taught separately from students observing population changes over time. We describe a classroom activity in which students investigate how the allele frequencies of soft-shell clam (Mya arenaria...
Journal Articles
The American Biology Teacher. 2017; 794309–312 doi: https://doi.org/10.1525/abt.2017.79.4.309
Published: 01 April 2017
... algebraic baggage. We also introduce interactive applets that draw on the distributive property of mathematics to allow students to experiment in real time. With the applets, students can observe the effects of changing allele frequencies on genotype frequencies in a population at Hardy-Weinberg equilibrium...
Journal Articles
The American Biology Teacher. 2018; 802132–138 doi: https://doi.org/10.1525/abt.2018.80.2.132
Published: 01 February 2018
...) and track changes in phenotypes to changes in allele frequencies. Cod has several genes which contribute to body size … By catching the big fish, alleles are removed which are crucial for body size. Therefore, the next generations of fish are smaller. [After fishery...
Journal Articles
The American Biology Teacher. 2013; 757476–479 doi: https://doi.org/10.1525/abt.2013.75.7.6
Published: 01 September 2013
...Michael S. Brewer; Grant E. Gardner Teaching population genetics provides a bridge between genetics and evolution by using examples of the mechanisms that underlie changes in allele frequencies over time. Existing methods of teaching these concepts often rely on computer simulations or hand...
Images
Published: 01 December 2019
Figure 2. The frequency of allele A 1 over generational time from four simulations. Figure 2. The frequency of allele A1 over generational time from four simulations.
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Published: 01 February 2016
Figure 5. Allele and genotype frequencies in a population at equilibrium (PopGen simulator). Figure 5. Allele and genotype frequencies in a population at equilibrium (PopGen simulator).
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Published: 01 February 2016
Figure 6. Effects of natural selection on allele and genotype frequencies in a stickleback population (PopGen simulator). Figure 6. Effects of natural selection on allele and genotype frequencies in a stickleback population (PopGen simulator).
Images
Published: 01 January 2010
Figure 2. Change in frequency of flightless alleles during selection experiment: ( a ) the vg allele and ( b ) the ap allele. Error bars represent 95% confidence intervals based on the averaging of four replicates. Solid line shows expected frequencies according to Equation 1 . Figure
Images
Published: 01 January 2010
Figure 3. Change in frequency of flight-independent marker alleles during selection experiment: ( a ) the e allele and ( b ) the se allele. Figure 3. Change in frequency of flight-independent marker alleles during selection experiment: (a) the e allele and (b) the se allele.
Journal Articles
The American Biology Teacher. 2014; 765338–344 doi: https://doi.org/10.1525/abt.2014.76.5.8
Published: 01 May 2014
... hellbender, reviews basic genetics, and exposes students to the scientific process that is used during PCR (polymerase chain reaction) and the analysis of microsatellites in order to calculate allele and genotype frequencies for understanding genetic variability. Once completing the lesson, students should...
Images
Published: 01 February 2018
Figure 2. New simulation, described in this paper, focusing on both phenotypic change (shrinking body size of Atlantic cod) and changes in allele frequencies due to size-selective harvesting ( www.evolution-of-life.com and Jördens et al., 2016 ). Figure 2. New simulation, described in this
Images
Published: 01 February 2018
Figure 4. The student worksheets include (A) a description of the phenomenon, (B) a simulation manual, (C) a table (for recording body sizes and allele frequencies), and (D) a diagram (for recording body size) for documenting the impact of artificial selection on phenotypes and genotypes
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Published: 01 May 2019
-generated results from clam HWE activity part 2, the resistant allele (solid line) increased in frequency in populations that experienced “events” associated with neurotoxin exposure while the sensitive allele (dashed line) decreased. Figure 3. Examples of student-generated results (B) compared to Connell
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Published: 01 February 2018
. Selection by predators is illustrated by pooled class data of survival from predator encounter videos. (D) Over time these processes result in changes in allele frequencies in populations. A thought exercise illustrates how allele frequencies can change in different scenarios. Figure 2. Students collect
Journal Articles
The American Biology Teacher. 2020; 822104–112 doi: https://doi.org/10.1525/abt.2020.82.2.104
Published: 01 February 2020
... pigmentation. The codominant nature of both mutated and wild-type Mc1r alleles resulted in a spectrum of fur color, and the prevalence of a specific fur color in an individual population reflected habitat substrate ( Mullen et al., 2009 ). Allelic frequencies of fur colors that matched the habitat's...
Journal Articles
The American Biology Teacher. 2019; 819680–685 doi: https://doi.org/10.1525/abt.2019.81.9.680
Published: 01 December 2019
...-F, 2.71-OL Advocacy for students............................1.1-E Affective domain............................7.507-I Affective outcomes............................3.176-I Agriculture............................1.61-D, 4.217-E, 4.242-I, 4.250-I, 4.256-I, 9.626-OL, 9.626-RL Allele...
Journal Articles
The American Biology Teacher. 2019; 812110–114 doi: https://doi.org/10.1525/abt.2019.81.2.110
Published: 01 February 2019
... variation, de novo genetic diversity, alleles Added ingredients Selective environmental pressure Taste preferences, scoring In nature, genotypes and phenotypes that are more likely to be eaten are less likely to increase in frequency in the population. The opposite is true in this activity. Traits...