The implication of the fact that genetic linkage studies frequently fail to replicate when subsequent researchers repeat the study in different families is that
A) the human genome is not well mapped.
B) researchers need to be more careful with their methods.
C) the environment is a more powerful influence on most forms of complex psychopathology than genetics.
D) it is doubtful that there are single gene causes for complex disorders.

Question

Quizplus · Accepted Answer

The fact that genetic linkage studies frequently fail to replicate suggests that there are likely not single gene causes for complex disorders. It is possible that multiple genes interact with each other and with environmental factors to contribute to the development of these disorders. This highlights the complexity and diversity of genetic influences on psychopathology.

The Implication of the Fact That Genetic Linkage Studies Frequently