Evolution Unit Vocabulary

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