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Familial Alzheimer's Disease continued...
The chromosome 21 gene is an interesting Alzheimer's clue because of its role in Down syndrome. People with Down syndrome have an extra copy of chromosome 21. As they grow older, they often get Alzheimer’s symptoms, though at a younger age than others who get the disease. Their brain cells also show the same damage that happens to brains affected by Alzheimer’s. Scientists are still trying to fully understand the link between these two conditions.
Few researchers think that the search for Alzheimer's genes is over. But they also know genes aren’t the only cause of the disease. More research will show how DNA, lifestyle habits, and things in the environment play roles in making people more likely to get the condition.
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