Across
- 4. reduction in genetic variation
- 8. natural selection
- 10. variation in relative genotypes
- 11. process of change
- 12. Form of a gene
- 14. basic unit of heredity
- 16. quality or characteristic
- 17. has nucleus
- 18. evolutionary process
- 20. no longer exist
Down
- 1. no nucleus
- 2. sharp reduction in population
- 3. skin color, hair color, etc.
- 5. movement of gene
- 6. not affected by something
- 7. Survival of the fittest
- 9. type of asexual reproduction
- 13. study of embryo
- 15. single celled
- 19. change of a species