Figure 2. Effect of ethnicity and odds ratio on the recommended sample size of an association study conducted on this population using dominant (A) or recessive (B) models of action of the genetic variant studied (i.e., increased risk of the DD or the TT genotype in a recessive model, or the presence of the D or T allele in a dominant model). ACE = angiotensin-converting enzyme; ATG = angiotensinogen. Open circles = white subjects; closed circles = mulatto subjects; triangles = black subjects.