Unit 3

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Across
  1. 4. made up of the same species
  2. 6. population size with genetic drift
  3. 7. natural ________
  4. 9. genetic ____________
  5. 12. selection where one extreme trait is favored
  6. 13. population size with no genetic drift
  7. 14. selection where both extreme traits are favored
  8. 15. traits influenced by natural selection
  9. 17. distribution of species
  10. 19. selection when mating is not random
  11. 21. versions of a gene
  12. 22. graph that shows how related species are
  13. 23. structures that have similar anatomy or bone layout but different functions; show common ancestry
Down
  1. 1. structures that no longer serve a purpose and may reduce in size over time
  2. 2. gene ________
  3. 3. random changes in DNA
  4. 5. blending into an environment in order to avoid predators
  5. 8. one species looks or resembles another that is harmful.
  6. 10. unit of inheritance
  7. 11. selection where the middle or average trait is favored
  8. 16. members of a population
  9. 18. looking for relationships in structure during embryonic stages
  10. 20. structures that are similar in function but different anatomy; do not show common ancestry