Across
- 1. anything in the environment that causes change in DNA
- 3. large organelle that contains a cell's DNA
- 8. a substance that makes up much of an organism's structure
- 11. organisms with desired traits are bred
- 13. study of inheritance of genes
- 15. a structure made up of the cell's DNA wrapped around proteins
- 16. the smallest form of life
- 17. has multiple cells
- 19. an allele that is expressed only when 2 copies are present
Down
- 2. having one cell only
- 4. only in a plant cell, where photosynthesis takes place
- 5. a nonliving particle that makes copies of itself in living cells
- 6. powerhouse of the cell
- 7. a specific version of a gene
- 9. a gel-like substance that fills the inside of a cell
- 10. a trait that is a distinct way in which an organism interacts with its environment
- 12. segment of DNA that contains instructions to make a protein
- 14. a cell structure that makdes proteins
- 16. body system made up of hear and blood vessels
- 18. body system that breaks down food for energy