Across
- 1. Segment of DNA that codes for a trait
- 3. Random change in DNA
- 5. Movement of genes between populations
- 6. Characteristic of an organism
- 7. Different versions of the same gene
- 11. A group of individuals of the same species living in an area
- 12. Change in populations over time
- 14. Random changes in allele frequencies in a population
- 16. Trait that increases survival or reproduction
- 17. Complete disappearance of a species
- 18. Group of organisms that can interbreed
- 20. Formation of a new species
Down
- 2. Process where organisms with favorable traits survive and reproduce
- 4. Environmental factor that affects survival and reproduction
- 8. Preserved remains or traces of ancient organisms
- 9. Differences among individuals in a population
- 10. Species from which others have evolved
- 13. Molecule that carries genetic information
- 15. An organism’s ability to survive and reproduce
- 19. The ability to stay alive