This website provides information in various aspects about sickle cell disease, including the cause of the disease, the inheritance mechanism, the diagnosis, treatment, and a patient describing how it is like to have sickle cell disease (Click the left panel and you will be able to enter each of these aspects). At the bottom of the website, users can link to the companion site of "DNA From the Beginning" to further examine the relevant biological concept. This sickle cell disease website is one of the units from Your Genes, Your Health http://www.ygyh.org/index.htm More disease such as fragile X syndrome, cystic fibrosis, huntington disease, and Alzheimer disease can be found in this website.