| Gene | Description | Location | Gene Omim Number | Disease Omim Number |
| RAB5A | RAS-ASSOCIATED PROTEIN RAB5A; RAB5A | 3p24.3 | 179512 | 179512 |
| RAG1 | RECOMBINATION-ACTIVATING GENE 1; RAG1 | 11p13 | 179615 | 179615 |
| RAI | RETINOIC ACID-INDUCED GENE 1; RAI1 | 17p11.2 | 607642 | 182290 |
| RAI1 | RETINOIC ACID-INDUCED GENE 1; RAI1 | 17p11.2 | 607642 | 607642 |
| RECQL2 | RECQ PROTEIN-LIKE 2; RECQL2 | 8p12-p11.2 | 604611 | 277700 |
| RECQL3 | RECQ PROTEIN-LIKE 3; RECQL3 | 15q26.1 | 604610 | 210900 |
| RECQL4 | RECQ PROTEIN-LIKE 4; RECQL4 | 8q24.3 | 603780 | 603780 |
| RET | REARRANGED DURING TRANSFECTION PROTOONCOGENE; RET | 10q11.2 | 164761 | 164761 |
| RHO | RHODOPSIN; RHO | 3q21-q24 | 180380 | 180380 |
| RMRP | MITOCHONDRIAL RNA-PROCESSING ENDORIBONUCLEASE, RNA COMPONENT OF; RMRP | 9p21-p12 | 157660 | 157660 |
| RP1 | RP1 GENE; RP1 | 8q11-q13 | 603937 | 603937 |
| RYR1 | RYANODINE RECEPTOR 1; RYR1 | 19q13.2 | 180901 | 180901 |