The Embark people have done an exceptional job with their graphics and explanations about genetics. Their chromosomal map is a thing of beauty.

And that's the thing, isn't it? Would we want to know if we were predisposed to certain diseases. Most conditions involve a complex stew of genes and environmental factors. The commercial tests only look at one or two genetic markers. Now that we can test, maybe the question becomes, do we have an obligation to know. (Certainly the life insurance companies would love that.) But perhaps that's best left to philosophers?