Across
- 2. bond, alternation between dna
- 6. dna is copied in cells
- 7. parallel, line that are going the oppisot way
- 9. basic unit of heredity
- 12. helix, struture of dna
- 13. thread like structure
- 14. nucleic base
Down
- 1. base of dna
- 3. chemical compund
- 4. instruction to genes
- 5. basic building block
- 8. a nitrogen base
- 10. base pair,specific paring
- 11. one of four nuclect bases
- 12. long chaine of molecules