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Allele Frequencies
| Polymorphism | Children | Parents |
|---|---|---|
| Dopamine D4 Receptor (DRD4) exon III VNTR | ||
| 2-repeat | .07 | .07 |
| 3-repeat | .05 | .05 |
| 4-repeat | .67 | .65 |
| 7-repeat | .20 | .21 |
| Dopamine Transporter (DAT1) 3’ UTR VNTR | ||
| 9-repeat | .24 | .24 |
| 10-repeat | .75 | .76 |
| Serotonin Transporter (5HTT) LPR | ||
| Short | .44 | .43 |
| Long | .56 | .57 |
