Related Clues:
- It's in chains
- High-tech ''fingerprint''
- Code of life
- Long, long sentence
- Single-stranded cell substance, often
- It's shared by identical twins
- CSI concern
- Word substituted FOR the last word of 23-Across
- Watson-Crick subject
- Biographer's topic
- It's stranded in the body
- 6-Across evidence
- It can prove kinship
- Biochem focus
- Father identifier