Which of the following groups have the greatest chance of having similar IQ scores: identical twins raised apart or two biologically unrelated individuals raised together?
A) two biologically unrelated individuals raised together
B) two identical twins raised apart
C) both groups will have equal chance to have similar scores
D) both groups will have zero chance to have similar scores
E) the probability is impossible to predict

Question

Quizplus · Accepted Answer

Identical twins share the same genes, which have a strong influence on IQ, and even when raised apart, they are likely to have similar scores. In contrast, biologically unrelated individuals do not share the same genes, so their IQ scores are less likely to be similar, even if raised together.

Which of the Following Groups Have the Greatest Chance of Having