Genetic testing is the most accurate diagnosing tool of any genetic disease, because, as it says in the name, the testing comes from the very root of the problem. The process of sequencing has become so accurate, fast, and cheap that it is the best choice to see the very point at which things have gone wrong, and even more to double check the diagnosis.

Originally, I thought that the process was very complicated, and at the base it is, but with the perfection of the techniques, it has become very simple.

The test starts with the isolation of the gene. There are many enzymes that have been found to break DNA in very specific sections. As soon as the sample is isolated, the DNA is incubated with "tags" that link to specific nucleotides. The DNA will pick up the tags after a few replications, and then will be seperated by length. The scanner resolution is so high it can seperate the DNA by one nucleotide. The DNA then can be run through a laser, which causes the tags to fluoresce in different colors. The computer picks up the different colors and comes up with a printout.

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An example of a DNA sequence test.

1. <http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/D/DNA_sequence.gif>