Londra and Sondra are identical twins who have been raised together in the same home. Londra has developed a psychological disorder, but Sondra does not appear to have the same disorder. This information could be used as evidence to suggest that
A)genetic factors have more influence than environmental factors in this disorder.
B)environmental factors have more influence than genetic factors in this disorder.
C)both genetic and environmental factors contribute equally to this disorder.
D)neither genetic nor environmental factors contribute to this disorder.

Question

Londra and Sondra are identical twins who have been raised together in the same home. Londra has developed a psychological disorder, but Sondra does not appear to have the same disorder. This information could be used as evidence to suggest that ​
A)genetic factors have more influence than environmental factors in this disorder.
B)environmental factors have more influence than genetic factors in this disorder.
C)both genetic and environmental factors contribute equally to this disorder.
D)neither genetic nor environmental factors contribute to this disorder.

Quizplus · Accepted Answer

Given that Londra and Sondra are identical twins and thus share the same genetic makeup, the fact that only one of them has developed a psychological disorder suggests that environmental factors (differences in their experiences, interactions, or personal choices) have a significant influence on the development of this disorder.

Londra and Sondra Are Identical Twins Who Have Been Raised