The most accurate statement with regard to the genetic influences of attention deficit/hyperactivity disorder is
A) there are no known genetic influences.
B) there appears to be a single gene influence.
C) there appear to be multiple genetic influences.
D) defects on the Y chromosome are the major influence.

Question

Quizplus · Accepted Answer

Research suggests that there are multiple genetic influences on the development of attention deficit/hyperactivity disorder (ADHD). This is supported by family and Twin studies that show increased likelihood of ADHD in relatives of individuals with the disorder and higher concordance rates among monozygotic twins compared to dizygotic twins. However, the specific genes and genetic mechanisms involved in ADHD are still being investigated.

The Most Accurate Statement with Regard to the Genetic Influences