Across
- 2. - Differences in traits among individuals of the same species.
- 5. - Different forms of a gene that determine specific traits.
- 8. Selection - The process by which organisms better adapted to their environment tend to survive and reproduce.
- 9. - Units of inheritance that determine specific characteristics.
- 10. - A feature that improves survival and reproduction.
- 12. - External factors that influence traits and characteristics.
- 13. - A change in the DNA sequence that can lead to variation.
Down
- 1. - The ability to continue living and reproducing.
- 3. - An allele that expresses its trait only when two copies are present.
- 4. - Characteristics of an organism.
- 6. - Structures that carry genetic information within cells.
- 7. - Passing genetic information from parents to offspring.
- 11. - An allele that expresses its trait even when only one copy is present.
