alleryIdentical twins reared together show an intelligence correlation of nearly:
A0.50
B0.90
C0.25
D0.72
Answer & Solution
Correct answer: B. 0.90
1. Identical twins share all their genes.
2. The intelligence of identical twins reared together correlates almost 0.90.
3. The figures 0.72, 0.50 and 0.25 belong to other pairs: identical twins reared apart, siblings reared together, and siblings reared apart.
_Source: NCERT Class XII Psychology, Ch 1 Variations in Psychological Attributes, "Intelligence: Interplay of Nature and Nurture", p. 9_
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