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iNatural Selection Activity: Peppered Moth Name: Modern evolution theory states that if the frequency of genes in a population changes over time, then the population is evolving. Peppered moths range in color from dark to light. The dark moths have the dominant gene for wing scale color and are either DD or Dd. The light-colored moths have the recessive genes and are dd. INSTRUCTIONS To see how peppered moths use camouflage to avoid bluejays… Type your name on this page, then click “save as” Peppered Moths. You will print and hand in this page when you are done. No writing is necessary. Click this Link: http://www.techapps.net/interactives/pepperMoths.swf Directions: Click “Pollution and Peppered Moths” read the information and click through the slides Kettlewell’s Experiment (Click and read) Click “Bird’s Eye View” (read) Click “Light Forest” Play: You are the Blue Jay eating as many moths as possible. Lichen-covered forest 1. Before the blue jay starts to eat, what percentage of moths are light-colored? ** what percentage of moths are dark-colored? ** 2. Feed your bluejay by clicking on as many moths as possible. What percentage of the moth population is light-colored now? ** What percentage of the moth population is dark-colored now? ** 3. In the lichen colored forest, what trait is selected for? ** What trait is selected against? ** Release moths in the soot-covered forest. 4. Before the blue jay starts to eat, what percentage of moths are light-colored? ** what percentage of moths are dark-colored? ** 5. Feed your bluejay by clicking on as many moths as possible. What percentage of the moth population is light-colored now? ** What percentage of the moth population is dark-colored now? ** 6. In the soot covered forest, what trait is selected for? ** What trait is selected against? ** 7. What kind of selection is changing the distribution of moth colors in the lichen and soot covered forests? Drag and drop the red circle to circle the correct answer. directional 1. disruptive stabilizing Data Table Percent Dark Moths Lichen Forest Sooty Forest Percent Light Moths 2. Explain how the color of moths increases or decreases their chances of survival depending on the environment. 3. 500 light colored moths and 500 dark colored moths are released into a polluted forest. After 2 days the moths were recaptured, make a prediction about the number of each type of moth that would be captured. 4. How has the striking change in coloration come about? (Include an explanation of how the dark moth appeared and how the proportion of dark moths changed from 0.0005% to more than 90% in polluted forests.) 5. What underlying law of nature has produced this change? (Hint: answer in “Pollution and Peppered Moths” section) 6. How does the change in allele frequency show evolution?