Chapter 11: Population Genetics

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Across
  1. 4. These extinctions occur continuously at a very low rate.
  2. 5. Allele frequencies are a measure of genetic ____.
  3. 6. __ not individuals evolve due to natural selection and genetic drift.
  4. 8. Timing prevents mating in this type of selection.
  5. 9. In this type of isolation, physical barriers divide the population.
  6. 13. A drastic reduction in a population. (volcanoes, earthquakes, landslides, ...)
  7. 15. The elimination of a species from Earth.
  8. 16. _____ are responsible for the inheritance of characteristics.
  9. 18. A group of the same species living in an area.
  10. 19. The study of genetic variation within a population through time.
  11. 21. Anscestral species diversifies into many descendant species.
  12. 23. The type of selection that favors extreme over intermediate phenotypes.
  13. 25. The change in the gene pool of a small population due to chance.
  14. 26. During speciation, isolated populations may become so different that they can no longer ____.
  15. 28. In ___ two species evolve in response to changes in each other.
  16. 29. This type of isolation includes differences in courtship or mating behaviors.
  17. 30. This type of evolution occurs when closely related species adapt to different environments.
Down
  1. 1. This type of selection occurs when certain traits increase mating success.
  2. 2. Pattern of evolution seen in the fossil record.
  3. 3. Evolution within a population.
  4. 7. ____ evolution is evolution toward similar characteristics in unrelated species.
  5. 10. The "raw material" for natural selection.
  6. 11. All of the alleles of all individuals in a population.
  7. 12. Genetic exchange due to the migration of fertile individuals or gametes between populations.
  8. 14. The ____ effect occurs when a new colony is started by a few members of the original population.
  9. 17. This type of extinctions is rare but intense - destroy many species at the global level.
  10. 20. __ __ in England, during the Industrial Revolution, are a classic example of micro-evolution.
  11. 22. This type of selection favors individuals at one end of the phenotypic range.
  12. 24. Type of selection that favors intermediate over extreme phenotypes.
  13. 27. The rise of two or more species from one species.