Twin studies most clearly indicate that ________ exert(s)a strong influence on the development of our unique personality traits.

Question

Quizplus · Accepted Answer

Twin studies compare the similarities in personality traits of monozygotic (identical) twins who share 100% of their genes and dizygotic (fraternal) twins who share on average 50% of their genes. By comparing these similarities between the two types of twins, researchers can estimate the influence of genetic factors on personality traits. Therefore, person-to-person genetic variations (choice D) are the most likely to exert a strong influence on the development of unique personality traits. The other options (prenatal genetic testing, shared family environments, and free-floating stress hormones) may have some impact on personality development, but twin studies show that genetic factors play a larger role.

Twin Studies Most Clearly Indicate That ________ Exert(s)a Strong Influence