Researchers Hypothesized That a Particular Gene That Affects the Neurotransmitter

Multiple Choice

Researchers hypothesized that a particular gene that affects the neurotransmitter dopamine was involved in schizophrenia and then identified one group of subjects with schizophrenia and another without and examined whether the two groups had different alleles for the candidate gene.This is a(n)  ______.

A) family study
B) linkage study
C) association study
D) behavioral study