The problem with family aggregation studies is that they ____.
A) are difficult to carry out
B) do not control for environmental variables
C) only tell us about the influence of the environment
D) only tell us about chromosomal abnormalities

Question

Quizplus · Accepted Answer

Family aggregation studies are designed to examine the occurrence of a disorder or trait in families to determine if there is a genetic component. However, they do not control for environmental variables, which can also play a role in the development of the disorder or trait. Therefore, it is difficult to determine the sole impact of genetics without also considering environmental influences.

The Problem with Family Aggregation Studies Is That They ____