In twin studies,it is assumed that heredity influences a characteristic if dizygotic twins are more alike than monozygotic twins.

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This statement is incorrect. In twin studies, it is assumed that heredity influences a characteristic if monozygotic twins are more alike than dizygotic twins. This is because monozygotic twins share all of their genetic material, while dizygotic twins share only about 50% of their genetic material on average. The greater similarity of monozygotic twins suggests a stronger genetic influence on the characteristic being studied.

In Twin Studies,it Is Assumed That Heredity Influences a Characteristic