Across
- 4. Any chance in the DNA sequence of a cell
- 6. Different species that share a common ancestor
- 8. A change or difference in something
- 9. Traits that can be passed down from parent to offspring
- 11. A mechanism of evolution
- 12. The genetic make-up of an organism
- 14. An organisms ability to survive and reproduce
- 15. Changes in the heritable traits of a population of organisms as successive generations replace one another
Down
- 1. An organism that is directly related to an ancestor
- 2. A trait that helps an organisms ability to survive
- 3. A different version of a gene that determines a specific trait
- 5. A British naturalist who developed the theory of evolution
- 7. The observable character traits of an organism, determined by its genes
- 10. An individual from whom you are biologically descended from
- 13. The complete disappearance of a species from earth