The fact that correlations of intelligence are much higher between identical twins than between fraternal twins lends support to the idea that
A)intelligence is entirely inherited.
B)intelligence in entirely environmental.
C)intelligence is at least partly inherited.
D)more studies need to be done because nothing can be confirmed from this information.

Question

Quizplus · Accepted Answer

The fact that the correlations of intelligence are much higher between identical twins than between fraternal twins suggests that there is a genetic component to intelligence. However, it does not mean that intelligence is entirely inherited. Environmental factors also play a role. Thus, choice C, which states that intelligence is at least partly inherited, is the best choice. Choice A, which says intelligence is entirely inherited, is too extreme and unsupported by the evidence. Choice B, which suggests intelligence is entirely environmental, is also not supported by the evidence. Choice D is not correct because the information provides some evidence that intelligence is partly inherited.

The Fact That Correlations of Intelligence Are Much Higher Between