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Table 2 DRD2 TaqI A allele frequencies, genotypes and genotype classifications

From: Examining impulsivity as an endophenotype using a behavioral approach: a DRD2 TaqI A and DRD4 48-bp VNTR association study

Allele/Genotype n %
Allele   
A2 274 70.3
A1 116 29.7
Total 390 100.0
Genotype   
A2/A2 96 49.2
A2/A1 82 42.1
A1/A1 17 8.7
Total 195 100.0
Genotype Classification*   
A1+ 99 50.8
A1- 96 49.2
Total 195 100.0
  1. *A1+ subjects have at least one A1 allele and A1- subjects are homozygous for A2.