Across
- 2. ____ selection is where humans are the determinants of selected traits
- 9. combined genetic information of all members of a particular population
- 12. ___ hypothesized that acquired traits can be inherited
- 14. hybrid ____ occurs when two different species produce offspring that cannot develop to adulthood
- 16. migration of alleles into or out of a population
- 17. isolation that occurs after fertilization
- 18. bird species that Darwin observed on the Galapagos
- 19. type of selection in which a particular trait is enhanced
- 20. any random occurrence that can change the frequency of a alleles
- 22. an inherited characteristic that increases an organism's fitness
- 23. state in which alleles remain constant
- 25. isolation in which courtship behaviors differ
- 27. only ___ can evolve
- 28. isolation in which habitats are different
- 29. reproductive ___ separates different species
- 30. Natural Selection selects the ___ of a population
Down
- 1. event in which a large population decreases in size dramatically
- 3. the development of a new species over time
- 4. scientist who developed the theory of uniformitarianism
- 5. isolation in which physical components of organisms are mismatched
- 6. type of selection in which organisms move away from the average
- 7. isolation that occurs before fertilization
- 8. hybrid ___ occurs when subsequent generations degenerate
- 10. scientist who developed the theory of deep time
- 11. evolution is the change in ____ over time
- 13. type of selection in which organisms move toward the average
- 15. hybrid ___ occurs when two different species produce sterile offspring
- 21. isolation in which mating times are different
- 24. the main source of genetic variability
- 26. ability of an individual organism to survive and reproduce