What Genetic diseases can you go and get DNA carrying out tests for?

I know hungington's is one

but what else?

Like to determine before you have the onset of symptoms
Answers:
Over 1000 genetic test are offered by commercial medical labs, recreational genomics companies offer even more interpretations of genetic variation.

Examples:

Alzheimer's disease* (APOE; late-onset variety of senile dementia)
Charcot-Marie-Tooth (CMT; loss of fancy in ends of limbs)
Cystic fibrosis (CF; disease of lung and pancreas resulting in thick mucous accumulation and chronic infections)
Phenylketonuria (PKU; progressive mental retardation due to missing enzyme; correctable by diet)
Polycystic Kidney Disease (PKD1, PKD2; cysts in the kidneys and other organs) Source(s): http://www.ornl.gov/sci/techresources/Hu…

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