Biology Crossword

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Across
  1. 2. theory of evolution creator
  2. 4. the deeper it is the older it is
  3. 6. same function but not related
  4. 8. age of dinosaurs
  5. 11. percentage of DNA from each parent
  6. 12. age of mammals
  7. 15. theory of transformation
  8. 17. traits through generations
  9. 18. animal Darwin studied
  10. 20. changing a gene in a lab
  11. 21. change in population overtime
  12. 22. what killed the dinosaurs
  13. 24. similar bone structure
  14. 26. 88% of Earth's history
  15. 27. actual age of fossil
  16. 28. age of fish
  17. 29. change in a gene
  18. 30. what codes for a specific trait
  19. 31. plant Mendel studied
  20. 34. first organisms on Earth
  21. 35. multiple versions of the same gene
Down
  1. 1. survival of the fittest
  2. 3. majority of animals dying off
  3. 5. humans decide best traits
  4. 7. different pair of alleles
  5. 9. evidence for evolution
  6. 10. same pair of alleles
  7. 13. a condensed structure of DNA
  8. 14. estimated age of fossil
  9. 16. the genetic code of a gene
  10. 19. scientist that studied genetics
  11. 21. change in this causes extinction
  12. 23. predicts genotypes in offspring
  13. 25. Earth's history
  14. 32. trait that helps an animal survive
  15. 33. what is created to express a trait