Resource: 23 and me

There are a few for profit companies that can now do genome wide tests from a saliva sample to determine if you have a particular gene or sequence (marker) linked to an increased risk of getting a particular trait (such as Alzheimer's Disease).  Here is a link to one of those sites called 23andme.  You can peruse their website for additional information about human genetics.

23andme Links to an external site.