Certain genes increase the risk of getting Alzheimer's disease.

Genes control how every cell in the body works. Some genes decide basic traits, such as the color of the eyes and hair. Other genes can increase the risk of getting certain diseases, including Alzheimer's disease.

Researchers have found several genes that are linked to Alzheimer's disease. Some genes, called risk genes, increase the likelihood of getting the disease. Others, called deterministic genes, cause the disease. Deterministic genes are rare. Genes are only part of what's involved in getting Alzheimer's disease.