Evolution

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Across
  1. 4. Natural differences in traits within a species
  2. 5. Total collection of alleles in a population
  3. 9. Chance changes in allele frequencies, often in small groups.
  4. 11. Ancestor Ancient species from which others descended
  5. 12. Naturalist who proposed evolution by natural selection.
  6. 14. Selection Humans breeding for specific traits
  7. 16. Organisms that can interbreed to produce fertile offspring
  8. 17. Change over time
  9. 18. Slow, steady evolution over long periods
  10. 20. Inherited trait enhancing survival.
Down
  1. 1. Group of one species in the same area
  2. 2. Passing on genes; essential for evolutionary success.
  3. 3. Using DNA/amino acids to determine species relatedness.
  4. 6. Survival/reproduction of better-adapted organisms..
  5. 7. Organism's ability to survive and reproduce
  6. 8. Long periods of no change interrupted by rapid change.
  7. 10. Preserved remains of ancient organisms.
  8. 13. Similar features in species due to environment, not ancestry.
  9. 15. Population separation preventing breeding
  10. 19. Random DNA change creating new variation