A concordance of 50% for a trait occurring in identical twins only provides evidence for the role of nature or genes in the development of this trait, and does not yield any information regarding the role of nurture or environment in this trait.

Question

Quizplus · Accepted Answer

A concordance of 50% in identical twins suggests that both genetics (nature) and environment (nurture) play roles in the development of the trait, as identical twins share the same genes but the trait does not occur in both twins 100% of the time, indicating environmental influences.

A Concordance of 50% for a Trait Occurring in Identical