Minnesota Transracial Adoption Study shows black adoptees IQ matches ordinary blacks in white homes. Mulattoes adopted by whites score between blacks and whites at age 17. Moore study blacks and mulattoes score close when adopted by whites but lacks white controls. Owen South Africa study coloreds score between blacks and whites on Progressive Matrices. Gaps widen on harder questions proving genetic loading. Rowe Add Health data mixed blacks score above blacks below whites on PVT. Tizard Caribbean study ignores due to selected orphanage sample. Fernandez Brazil study browns mestizos between whites and blacks. Claassen South Africa aptitude tests show coloreds between whites and blacks. Eyferth study mixed black-white kids IQ 96.5 matches hereditarian prediction after soldier selection adjustment. Rushton university students coloreds intermediate despite admission IQ floor compressing blacks more. Udry Add Health white-Asian hybrids intermediate on PVT and GPA matching parental profiles. NAEP 2011 mixed black-whites between blacks and whites. Intermediate scores refute simple environment or racism explanations. Genetics simplest explanation for admixture effects.