Across
- 3. chromosomes.
- 7. a threadlike strand of coiled DNA in the nucleus that controls cell
- 10. and carries genetic material to pass traits to offspring, humans have 23 pairs
- 12. A trait or character that is genetically inherited or passed down
- 13. is present
- 14. the study of heredity
Down
- 1. a physical characteristic that is not inherited but may be an effect
- 2. a unit genetic material that determines a trait
- 4. generation to generation
- 5. strong form of a gene which is expressed even if a recessive
- 6. the passing of traits from parents to offspring
- 8. the weak form of a gene which is not expressed when the
- 9. the environment
- 11. form is also present