When investigators try to determine what percentage of various human traits is due to nature (inheritance) and what percentage is due to nurture (the environment), scientists often examine
A) siblings that share only one parent and were separated at birth.
B) non-identical siblings that were separated at birth.
C) identical human twins that were separated at birth.
D) adopted siblings that have been separated due to divorce.
E) unrelated children who have been adopted by the same family and grew up together.

Question

Quizplus · Accepted Answer

Identical human twins that were separated at birth are the best choice for determining the extent of nature versus nurture on human traits because they share 100% of their DNA (nature), but are exposed to different environments (nurture). By comparing the similarities and differences between their traits, scientists can estimate how much of the trait is attributable to genetic factors and how much is due to environmental factors.

When Investigators Try to Determine What Percentage of Various Human