Donald and Ronald are identical twins who have been raised apart, in separate adoptive homes. However, both brothers have developed the same psychological disorder. This information could be used as evidence to suggest that
A)environmental factors have more influence than genetic factors in this disorder.
B)both genetic and environmental factors contribute equally to this disorder.
C)genetic factors have more influence than environmental factors in this disorder.
D)neither genetic nor environmental factors contribute to this disorder.

Question

Donald and Ronald are identical twins who have been raised apart, in separate adoptive homes. However, both brothers have developed the same psychological disorder. This information could be used as evidence to suggest that ​
A)environmental factors have more influence than genetic factors in this disorder.
B)both genetic and environmental factors contribute equally to this disorder.
C)genetic factors have more influence than environmental factors in this disorder.
D)neither genetic nor environmental factors contribute to this disorder.

Quizplus · Accepted Answer

The fact that identical twins, raised in separate environments, developed the same psychological disorder suggests that genetic factors have a significant influence on the disorder, as they share the same genetic makeup but were exposed to different environments.

Donald and Ronald Are Identical Twins Who Have Been Raised