Table 2.
Detailed zygosity classification for the Gemini sample combining questionnaire data and DNA genotyping
| N | Classification procedure | |
|---|---|---|
| Total | 2402 | |
| MZ | 749 (31.2 %) | |
| 219 | Using available DNA | |
| 282 | Matching questionnaire results | |
| 248 | Only questionnaire at 8 months available | |
| DZ | 1616 (67.3 %) | |
| 816 | Opposite sex twin pairs | |
| 91 | Using available DNA | |
| 354 | Matching questionnaire results | |
| 342 | Only questionnaire at 8 months available | |
| 6 | Questionnaire at 8 months only, uncertain result at 29 months | |
| 7 | Questionnaire at 29 months only, uncertain result at 8 months. | |
| Unknown | 37 (1.5 %) | Uncertain questionnaire results, no DNA available |