Click next Identify and describe the four basic mechanisms for evolutionary

Click next identify and describe the four basic

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7. [Click ‘next’] Identify and describe the four basic mechanisms for evolutionary change in your own words! Mechanism: 1. Mutation 2. Migration 3. Genetic drift 4. Natural selection Description 1. Makes certain genes for an offspring differ from their parents. 2. Organisms with unique gene join population with many different ones. 3. One gene becomes more frequent due to the other dying off. 4. An organism with certain traits will survive to reproduce due to traits that help it survive. 8. Genetic drift and natural selection only take place if there is reproductive success. 9. [Click next several times to read about mutations] Now complete the paragraph below regarding gene flow. “Gene flow, also called migration, is any movement of individuals from one population to another. Gene flow includes lots of different kinds of events, such as pollen being blown to a new destination or people moving to new cities or countries. If gene versions are carried to a population where those genes previously did not exist, gene flow can be a very important source of genetic variation. In the graphic on the website, the gene for brown coloration moves from one population to another.”
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10. [Click next and read until you get to Genetic Drift] Summarize the idea behind genetic drift. Along with natural selection, mutation, and migration - is one of the basic mechanisms of evolution. In each generation, some individuals may, just by a chance, leave behind a few more descendants ( and genes, of course!) than other individuals. The genes of the next generation
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  • Fall '19
  • DNA, Evolution, Galapagos Islands, B. Natural Selection

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