Frequencies of the seven possible haplotypes at four markers within MLH1 (n=170)
| Haplotype | Frequency |
| 2 1 6 2 | 0.374 |
| 1 1 6 2 | 0.120 |
| 1 2 1 1 | 0.041 |
| 1 2 2 1 | 0.006 |
| 1 2 4 1 | 0.024 |
| 1 2 5 1 | 0.294 |
| 1 2 7 1 | 0.141 |
The four markers correspond to exon 8 (A/G), BAT-21, D3S1611, and IVS14 (A/G), respectively (see text for haplotype numbering). Rare allele 3 at D3S1611 was not present in this series.