Across
- 2. a chemical that causes mutations
- 4. pieces of chromosomes get exchanged
- 6. 1 nucleotide is replaced
- 7. a pseudo-living thing that can cause mutations and illness
- 9. nucleotide deleted
- 10. study of parts of the body
Down
- 1. extra nucleotide added
- 3. remains from ancient organisms
- 5. study of embryos
- 8. a type of ray from the sun that causes mutations