Of the following categories of relationship, the lowest degree of similarity of IQ has been found among
A) brothers and sisters reared together.
B) identical twins reared apart.
C) brothers and sisters reared apart.
D) identical twins reared together.

Question

Quizplus · Accepted Answer

The lowest degree of similarity of IQ has been found among brothers and sisters reared apart (C), as environmental factors and different upbringing conditions can significantly influence IQ, leading to greater variability compared to genetic relatives reared together or identical twins.

Of the Following Categories of Relationship, the Lowest Degree of Similarity