Barbara and Brenda are identical twins who were adopted at birth and raised by two different families.Andy and Andrew are identical twins raised together by their biological parents.When the four children entered high school they took an IQ test.Barbara and Andy each had scores of 110,while Brenda's IQ was measured at 120 and Andrew scored 108.These results support which of the following conclusions?

Question

Quizplus · Accepted Answer

The fact that Barbara and Brenda, who have the same genetic makeup, have different IQ scores suggests that genetics alone cannot fully explain intelligence. Similarly, the fact that Andy and Andrew, who were raised in the same environment, have different IQ scores suggests that environment alone cannot fully explain intelligence. Therefore, a combination of genetics and environment likely contributes to intelligence.

Barbara and Brenda Are Identical Twins Who Were Adopted at Birth