In the 1920s behavioral geneticists realized that research on "separated" twins could be used to determine the "heritability" of any measurable trait,but only if certain conditions were met. Which of the following was not one of those conditions

Question

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The condition that twins must be dizygotic is not necessary for determining the heritability of a trait through separated twin research. In fact, only monozygotic twins can provide insight into the extent to which a trait may be influenced by genetics versus environment. Therefore, option B is not a necessary condition for this type of research.

In the 1920s Behavioral Geneticists Realized That Research on "Separated