| Answer | Crossword Clue |
|---|---|
| RNA | Chain letters, to geneticists |
| DNA | Geneticist's letters |
| RNA | Geneticist's letters |
| DNA | Letters for geneticists |
| RNA | Chain letters? |
| DNA | Chain letters? |
| MTNS | Chain letters? |
| DNA | Chain letters |
| IHOP | Chain letters? |
| SANDM | Chain letters? |
| IGA | Supermarket chain letters |
| IHOP | Flapjack-chain letters |
| KFC | Food-chain letters |
| BILKRATES | Postage for chain letters? |
