Which of the following statements supports the theory that intelligence is determined in part by genes?
A) The correlation between IQ scores is stronger for fraternal twins than it is for identical twins.
B) Diet and lifestyle factors influence intelligence.
C) Offspring are more similar to their parents when they grow up with them as opposed to when children are raised apart from their parents.
D) Identical twins separated by adoption still have highly correlated IQ scores.

Question

Quizplus · Accepted Answer

The fact that identical twins separated by adoption still have highly correlated IQ scores supports the theory that intelligence is determined in part by genes. If intelligence was solely influenced by environment factors such as upbringing, then we would expect less similarity in IQ scores between separated identical twins.

Which of the Following Statements Supports the Theory That Intelligence