chapter 17 volcabulary

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Across
  1. 3. the study of past and present distribution of organisms
  2. 8. formation of new species
  3. 11. individuals at the upper and lower ends of the distribution curve are more fit
  4. 12. individuals at the end of the distribution curve are more fit
  5. 15. a trait controlled by just on gene
  6. 16. individuals at the center of the distribution curve are more fit
  7. 18. a genetic change
  8. 19. how well and organism survive/reproduce in its environment
  9. 20. how and organism changes over a long period if time
Down
  1. 1. teacher of this class room
  2. 2. Darwin used the animals to support evolution
  3. 4. when a population is separated buy a geographic barriers.
  4. 5. a trait that is controlled by two or more genes
  5. 6. process by which organisms that are most suited to their environment
  6. 7. a population whose members can breed and produce fertile offspring
  7. 9. random change in the frequency of the allele in a gene pool
  8. 10. an individual selects a mate based on heritable traits
  9. 13. method that uses mutation rates in DNA to estimate the length of time that two species evolved
  10. 14. islands where Darwin studied
  11. 17. contains all the alleles of all the genes in a population