“…Nonetheless, documented Asian advantages on low-level (e.g., reaction time) and high-level (e.g., IQ) measures of intellectual function (Rushton & Jensen, 2005) allow for the possibility of genetic contributions to group differences in pitch labeling. Evidence of a normal distribution for pitch memory (Schellenberg & Trehub, 2003) and a bimodal distribution for AP (Athos et al, 2007) raises the possibility that a relatively isolated gene (Drayna, 2007) could underlie the pitch-labeling component of AP. Indeed, genetic differences between ethnic or racial groups are much more plausible for Mendelian traits (e.g., male pattern baldness, eye color), with dominant and recessive alleles, than they are for complex, polygenic traits such as intelligence (Sternberg, Grigorenko, & Kidd, 2005).…”