Evolution Unit Vocabulary

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Across
  1. 3. preserved remains or traces of ancient organisms
  2. 8. survival of the fittest
  3. 12. natural selection in which individuals at the upper and lower levels of the curve have higher fitness
  4. 13. form of natural selection in which individuals near the center of a distribution curve have a higher fitness
  5. 15. form of natural selection in which individuals at one end of a distribution curve have higher fitness
  6. 17. trait controlled by two or more genes
  7. 18. trait controlled by one gene that has two alleles
  8. 20. body parts that share a common function but not structure
Down
  1. 1. a group of similar organisms that can breed and produce fertile offspring
  2. 2. structures that are similar in different species of common ancestry
  3. 4. number times that an allele occurs in a gene pool compared with the number of alleles in that pool for the same gene
  4. 5. structure that is inherited from ancestors but has lost much or all of its original function
  5. 6. how well an organism can survive and reproduce in its environment
  6. 7. all of the genes
  7. 9. formation of a new species
  8. 10. heritable characteristic that increases an organism's ability to survive and reproduce in an environment
  9. 11. change in allele frequencies as a result of the migration of a small subgroup of a population
  10. 14. random change in allele frequency caused by a series of chance occurrences
  11. 16. study of past and present distribution of organisms
  12. 19. change over time