Minnesota Transracial Adoption Study shows black adoptees match ordinary black IQ while mulattoes score higher but below whites. Moore study finds blacks and mulattoes adopted by whites have close IQs 16 and 10.8 points above those adopted by blacks. Owen South Africa data places coloreds IQ midway between blacks and whites on Progressive Matrices. Racial IQ gaps widen dramatically on harder test items. Rowe NLSY analysis shows mixed black-white PVT scores intermediate between blacks and whites. Fernandez Brazil study ranks Asians highest, whites next, browns mestizos intermediate, blacks lowest. Claassen South Africa aptitude tests confirm Afrikaans whites top, English whites next, coloreds intermediate, blacks bottom. Eyferth study mixed black-white kids IQ 96.5 matches hereditarian prediction after army selection adjustment for black soldiers median IQ 90.77. Rushton university data shows coloreds intermediate between black and white South African students despite admission IQ floor compressing lower groups. Udry Add Health data places white-Asian hybrids intermediate to whites and Asians on both PVT and GPA. NAEP 2011 scores put mixed black-whites midway between blacks and whites. Scarr admits Minnesota data supports genetic hypothesis over pure environment. Mulattoes in Minnesota at age 7 IQ 109 trails adopted whites by only 2.5 points as heritability rises with age. Genetic admixture explains intermediate scores simpler than varying intermediate environments or racism levels. White-Asian hybrids intermediate on traits where parents differ confirms genetic composition of intelligence differences.