Across
- 2. before fertilization
- 4. similar traits evolve separately
- 6. reproductive success
- 7. same origin structures
- 8. random DNA change
- 9. no evolution model
- 11. how common an allele is
- 20. beneficial trait
- 22. survival of fittest
- 25. differences in traits
- 26. shared origin species
- 27. prevents mating
- 28. favors average
Down
- 1. favors extremes
- 3. leftover features
- 5. change over time
- 10. species become different
- 12. movement of genes
- 13. sudden population reduction
- 14. same function, different origin
- 15. human directed breeding
- 16. favors one extreme
- 17. after fertilization
- 18. new population from few individuals
- 19. random allele change
- 21. mate choice traits
- 23. formation of new species
- 24. all genes in population