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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 16 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 7 8 9 Thank You! • John Brady: [email protected] • Travis Curry: [email protected] • Website: http://tcurry1977.edublogs.org/