Natural Selection

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Author:
TheMaryPrincess
ID:
64782
Filename:
Natural Selection
Updated:
2011-02-08 17:13:45
Tags:
Biology
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Description:
Biology Exam 1 - 2nd Lecture
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  1. Descent with Modification
    Evolution - Species evolve from ancetral species as changes accumulate over time.
  2. Inherent
    Heritible
  3. Define population.
    A group of individuals of the same species living in a given area.
  4. What is the smallest unit of biological organization that can evolve?
    A population.
  5. In Darwin's theory variation is what?
    Inherited.
  6. What is the difference in phenotype vs genotype?
    • Phenotype: What you can see.
    • Genotype: The actual genetic code.
  7. What are genes comprised of?
    Alleles.
  8. What is the only source of new alleles?
    Mutation
  9. What mixes the genetic material?
    Sexual Recombination
  10. What are the five conditions for Hardy-Weinberg Equilibrium?
    • No Mutations
    • Isolation from Other Populations
    • Random Mating
    • Large Population Size
    • No Natural Selection
  11. Directional Selection
  12. Stabilizing Selection
  13. Disruptive Selection
  14. Why can't Natural Selection produce perfection?
    • Organisms are locked into historical constraints.
    • Natural Selection can only edit variations that already exist.
    • Genes can have multiple effects and/or interact.

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