Which of the following provides the strongest evidence of the role of heredity in determining intelligence?

Question

Quizplus · Accepted Answer

The fact that the IQ scores of identical twins who are raised separately are more similar to each other than the scores of fraternal twins who are raised together suggests that genetics plays a stronger role in determining intelligence than shared environment does. This is because identical twins share 100% of their genes, while fraternal twins share only 50%, just like ordinary siblings. Therefore, the greater similarity in IQ scores between identical twins points to genetics as the main factor.

Which of the Following Provides the Strongest Evidence of the Role