The findings from the Minnesota Study of Twins Reared Apart suggested that

Question

female twins are more intelligent than male twins.
there is a genetic component to intelligence.
intelligence is affected by early adoption.
fraternal twins raised together show a higher correlation between their IQs than do identical twins

Answer 1

The findings from the Minnesota Study of Twins Reared Apart suggested that there is a genetic component to intelligence. This study demonstrated that identical twins, even when raised apart, show higher correlations in their IQ scores compared to fraternal twins raised together, indicating a significant hereditary influence on intelligence.