Evolution QUIZ 3

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Across
  1. 2. selection Natural selection in which individuals at one end of the phenotypic range survive or reproduce more successfully than do other individuals.
  2. 7. pressure the environmental factors that favour certain phenotypes
  3. 8. selection natural selection in which individuals at the upper and lower ends of the curve have higher fitness than individuals near the middle of the curve
  4. 9. drift random change in allele frequencies that occurs in small populations
Down
  1. 1. selection form of natural selection in which individuals near the center of a distribution curve have higher fitness than individuals at either end of the curve
  2. 3. frequency Proportion of a specific allele in a population.
  3. 4. effect A change in allele frequency following a dramatic reduction in the size of a population
  4. 5. effect genetic drift that occurs after a small number of individuals colonize a new area
  5. 6. pool Combined genetic information of all the members of a particular population