Across
- 2. one of several forms of a gene responsible for hereditary variations, usu. produced by mutation.
- 5. a natural process of evolution in which the organisms that are best adapted to their environment survive and are able to reproduce, while those that are weak leave fewer or no offspring.
- 6. a sudden, apparently abnormal change or alteration in a genetically determined structure, as opposed to gradual evolutionary change.
- 7. a substance found in cells that contains information about the characteristics of a living thing.
- 8. is a tiny section of a chromosome. A gene causes a particular characteristic, such as eye color or hair color, to be passed on from parent to offspring.
Down
- 1. the identification by humans of desirable traits in plants and animals
- 3. the process of changing and adapting to an environment over time.
- 4. the observable traits of an individual or group, esp. as a function of genetic composition and environment.