Across
- 5. the process by which favorable inherited traits become more common over time
- 8. a rod-shaped structure within a cell’s nucleus that is composed of DNA and proteins
- 9. change in the inherited traits of a population of organisms that occurs over many generations
Down
- 1. a trait that is beneficial to an organism
- 2. a segment of DNA that determines or helps to determine a trait
- 3. a measure of how well an organism can survive and reproduce in a given
- 4. a change in a gene
- 6. one of two or more forms that a gene could take
- 7. a characteristic of an organism