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AP Biology Reading Guide 1.A.3 Name___________________Campbell 8th EditionCampbell 8th Edition pg 475-479Read twice— once for meaning and second to answer the questions1. First, let’s try to summarize the big idea from this section. Scan through the entire concept to pull? out? this?? information.? Three? major? factors? alter? allelic? frequency? and? bring? about evolutionary change. List each factor, and give an explanation. FactorExplanationDrawing2. Which of the factors above results in a random, nonadaptive change in allelic frequencies? 3. Which of the factors above tends to reduce the genetic differences between populations and make populations more similar? 4. Of the three factors you listed above, only one results in individuals that are better suited to their environment. Which is it? 5. Explain what happens in each of these examples of genetic drift: a) founder effect b) bottleneck effect 6. Genetic drift is based on_____________while natural selection is based on_____________7. Genetic drift and the Prarie ChickenWhat is the CLAIM being made?What is the EVIDENCE to support the claim?8. Fill in chart based on the effects of genetic driftKey PointSummaryDrawing9. How can gene flow affect the allele frequencies in a population?Apply your readingSuppose two plant populations exchange pollen and seeds. In one population, individuals of genotype AA are most common (9,000 AA, 900 Aa, 100 aa) while the opposite is true in other populations (100 AA, 900 Aa, 9,000 aa). If neither allele has a selective advantage, what will happen over time to the allele frequencies in these populations. Create a scenario for one population that was influenced by genetic drift. Describe what caused the change in alleles.Create a scenario for the other population that was influenced by natural selection. Describe what caused the change in alleles. ................
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