When actual blood-group testing are conducted, there are no significant correlations between ethnic ancestry and IQ scores because
A)blood type is not genetically-determined.
B)culture-fair tests were not utilized.
C)obvious external markers, like skin color, have little to do with underlying genetic differences.
D)of all of these.

Question

Quizplus · Accepted Answer

Blood type and IQ scores are not correlated because genetic differences that affect intelligence are not necessarily linked to external markers like ethnicity or skin color. Additionally, there is no evidence to suggest that blood type is related to intelligence, so even if it were a genetically-determined trait, it would not be relevant to IQ scores. Therefore, the correct answer is (C), that external markers like ethnicity are not reliable predictors of genetic differences related to intelligence.

When Actual Blood-Group Testing Are Conducted, There Are No Significant