Across
- 1. Segment of DNA
- 5. Random change in cells DNA
- 6. occurs when one or more bases are removed from a DNA strand
- 8. occurs when an extra base is added to the DNA strand
Down
- 2. molecular base
- 3. Tightly coiled DNA
- 4. occurs when a base is substituted for another DNA strand
- 7. Characteristics of living organism