If intelligence is determined primarily by heredity,which of the following pair-comparisons should show the same correlation in IQ scores?
A)fraternal twins and biological siblings
B)identical twins and fraternal twins
C)identical twins and parents-children
D)adopted twins and biological siblings

Question

Quizplus · Accepted Answer

Fraternal twins and biological siblings both share about 50% of their genes, so if intelligence is primarily determined by heredity, they should show a similar correlation in IQ scores.

If Intelligence Is Determined Primarily by Heredity,which of the Following