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post #1 of 4 (permalink) Old 12-20-2010, 09:16 AM Thread Starter
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Genetic Testing

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.
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post #2 of 4 (permalink) Old 12-20-2010, 12:06 PM
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Quote:
Originally Posted by Tom King View Post
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.
Hi Tom,

Are you talking about genetic testing for genetic problems, (and things like straight vs curly coat or satin) or the genetic testing they have for telling what breeds might go into a mixed breed dog? I know the former is quite reliable, but I've seen what seem to be some really strange results from the latter.


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post #3 of 4 (permalink) Old 12-20-2010, 01:04 PM Thread Starter
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Sorry. The question asked on the horse forums was specifically about the breed identification DNA testing. Some of the results do seem like they are not probable from the way a dog looks, but my answer addresses that.
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post #4 of 4 (permalink) Old 12-20-2010, 05:15 PM
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yeah Tom , I knew I read something about this , not too long ago. I found it finallly. LOL http://www.sciencedaily.com/releases...0810203503.htm and this quote is from another article. "Eighty percent of dog breeds are modern breeds that evolved in the last few hundred years, Wayne said. But some dog breeds have ancient histories that go back thousands of years".

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Last edited by davetgabby; 12-20-2010 at 05:44 PM.
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