Across
- 2. The genetic makeup of an organism
- 5. pool The total genetic diversity in a population
- 6. Alternative form of a gene
- 11. Gradual change in species over time
- 13. The ability of an organism to pass on its genes to the next generation
- 14. Differences between individuals of the same species
- 15. advantage A trait that increases an organism's chance of survival
- 18. Producing more offspring than the environment can support
- 19. Struggle between organisms for resources
- 20. A characteristic that helps an organism survive in its environment
Down
- 1. selection Process where organisms better adapted to their environment survive and reproduce
- 3. pressure Environmental factors that affect survival and reproduction
- 4. The physical expression of genetic traits
- 7. The complete disappearance of a species
- 8. drift Random changes in allele frequency in small populations
- 9. A group of organisms that can reproduce and have fertile offspring
- 10. selection Breeding of organisms by humans for desired traits
- 12. The formation of new species through evolution
- 16. The ability of an organism to continue living and reproducing
- 17. A random change in DNA that can lead to variation