Fruit Flies and Genetics Research

  1. Fruit Flies and Genetics Research: Imagine you are working in a genetics lab with the fruit fly Drosophila melanogaster, a model organism for genetics research. You want to determine whether a trait you have discovered in fruit flies is dominant or recessive.
    • Explain how you would design an experiment to answer this question.
    • Predict what types of outcomes are possible. Which would indicate that the trait is dominant? Which would indicate that it is recessive?
  2. Model Genetic Organisms: Why are fruit flies considered a model genetic organism? Would humans fit this description?
  3. Adaptations to a Changing Environment
    • Explain why it is necessary for organisms to have the ability to adapt.
    • Why is the current environment making it difficult for organisms to adapt?
    • Explain how organisms develop adaptations.
  4. Artificial Selection
    • Explain how artificial selection is like natural selection.
    • Why are quail useful subjects for an experiment on selection? What other organisms share similar characteristics?
  5. Species Interactions
    • Describe the form of species interaction that was observed between members of lion pride and between lions and hyenas.
    • Explain how this type of interaction may affect the population densities of the two species.
  6. Competition Between Species
    • Competition occurs when organisms compete for access to limiting resources. Can you think of resources that are not limiting?
  7. Selection of Traits
    • Do you think natural selection has shaped traits in these species that makes them better competitors?
    • If so, what types of traits might be involved? Explain your reasoning.

Sample Solution