To try and discover if the environment has an effect on a particular characteristic,scientists often examine
A)siblings that share only one parent and were separated at birth.
B)fraternal human twins that were separated at birth.
C)identical human twins that were separated at birth.
D)siblings that share both parents and were separated at birth.
E)unrelated children who have been adopted by the same family and grown up together.

Question

Quizplus · Accepted Answer

Identical human twins that were separated at birth have the same genetic material, so any differences in their characteristics must be due to environmental factors. This allows scientists to study the effects of the environment on a particular characteristic while controlling for genetic differences.

To Try and Discover If the Environment Has an Effect