Monozygotic twin pairs (MZ) have a higher concordance of IQ scores than any other pairs of individuals, even when reared apart. This finding suggests a(n) basis of intelligence.

A) genetic
B) hormonal
C) family environment
D) educational

Monozygotic Twin Pairs (MZ)

Identical twins that result from a single fertilized egg splitting, sharing the same genetic material.

Concordance

Concordance refers to the degree of similarity in the presence of a certain trait or condition, especially in twins, indicating the role of genetic factors.

Genetic Basis

the underlying genetic makeup that contributes to the physical and physiological traits or the likelihood of developing certain conditions.