Join Date: Aug 2006
Location: Lake Gaston, N.C.
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I just posted the following on my horse forums in response to a question, and decided that some readers here might like to read it, so I copied and pasted:
It's very accurate. People that don't know what they are talking about are willing to speak up and say that it's useless, but anyone that does know what they are talking about says it's accurate.
Only a few genes on a few of the 78 chromosomes determine what size the dog is and what it looks like. Most of the other chromosomes just make it a dog.
The majority of different breeds have evolved over a couple of hundred years at least, so even with one gene out of 40,000 mutating, breeds still end up with their own distinct DNA footprint.
Some people who speak against the test say that the databases are not large enough. Actually, it doesn't take a very large database since breeds typically have only anywhere from 2.2 to 4.4 chromosomes available per location.
Also, the people hired to do the initial research were hired by a philantropist, so the typical carismatic leader of a research team, whose most important job is raising money, was not needed. So the position of a spokesperson was not even thought of, and you ended up with a group of very good scientists who were not necessarily the best communicators.