A study of 8,000 twins who were World War II veterans found that:

Question

Quizplus · Accepted Answer

The study found that among the veterans who were identical twins, 35 percent of those who had Alzheimer's had a twin who also developed the disease. This supports the idea that genetic factors play a significant role in Alzheimer's risk. Option A is incorrect because the study did not state that there was a high prevalence of Alzheimer's overall, only among the studied population. Option B is incorrect because the study did not provide evidence that both twins tended to develop Alzheimer's among fraternal twins. Option D is incorrect because the study actually supports the role of genetic factors in Alzheimer's risk, rather than environmental influences.

A Study of 8,000 Twins Who Were World War II