Tim and Jim are identical twins who were raised apart. Ned and Ed are fraternal twins who were raised together. Which pair of twins will have more similar IQ scores, if either?
A) Tim and Jim
B) Ned and Ed
C) It is impossible to answer based on the given information.
D) All twins have the same IQ.

Question

Quizplus · Accepted Answer

Identical twins, like Tim and Jim, share 100% of their genes, which has a significant impact on IQ similarity. Environmental factors do play a role, but genetic factors are highly influential in determining IQ. Ned and Ed, being fraternal twins, share about 50% of their genes, similar to regular siblings, making their IQ scores potentially less similar than those of identical twins.

Tim and Jim Are Identical Twins Who Were Raised Apart