Twin Studies

Multiple Choice

Twin studies

A) cannot be used to study polygenic traits such as intelligence.
B) are based on the assumption that monozygotic twins are not more similar genetically than dizygotic twins.
C) are based on the assumption that heredity influences a trait if identical twins are more alike than fraternal twins.
D) often underestimate the influence of heredity because identical twins may have more similar environments than fraternal twins.