Across
- 4. study of the past
- 5. formation of new species
- 7. all the genes
- 8. structure that is inherited by ancestors
- 10. trait controlled by the gene that has 2 allele
- 12. change in allele frequency
- 13. change over time
- 14. preserved remains
- 16. random change in allele frequency
- 17. higher fitness in the middle
- 18. survival of the fittest
- 20. how well organisms can survive and reproduce in an enviroment
Down
- 1. share common function but not structure
- 2. trait controlled by two or more genes
- 3. structures that are similar in different species
- 6. higher fitness in the ends
- 9. center of a distribution curve have higher fitness
- 11. a group of similar organisms that can breed and produce fertile offspring
- 15. number of times that an allele occurs in a gene pool
- 19. heritable characteristic