All but which of the following methods is commonly used in genetic research?
a. Comparing magnetic resonance imaging scans of parents and children
b. Comparing prevalence rates of a disorder among relatives of affected youth
c. Calculating concordance rates between identical and fraternal twins
d. Examining the co-occurrence of disorders in biological and adoptive relatives
e. All of the above are methods commonly used in genetic research
Question 2
An asymmetry in brain development has been hypothesized to be a cause of
a. ADHD.
b. autism.
c. learning disabilities.
d. selective mutism.