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Author Topic: DNA test!  (Read 1565 times)

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Kate

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DNA test!
« on: 04 March 2008, 18:18:35 »
Hi everyone.  I was watching Divorce Court this morning and this guy had a DNA test done to see if he was the father of his kid.

The result was that there was 99.9999% chance he was the father.

If this is the case does this mean that due to the high number of tests done in the world that some MUST be wrong as the results are not 100%?

What do you think?
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TheBoy

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Re: DNA test!
« Reply #1 on: 04 March 2008, 19:00:00 »
Quote
Hi everyone.  I was watching Divorce Court this morning and this guy had a DNA test done to see if he was the father of his kid.

The result was that there was 99.9999% chance he was the father.

If this is the case does this mean that due to the high number of tests done in the world that some MUST be wrong as the results are not 100%?

What do you think?
I think the problem is with genetically close people - eg, siblings etc - are more difficult to tell apart.
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waspy

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Re: DNA test!
« Reply #2 on: 04 March 2008, 19:06:53 »
Nothing in this world is 100% except a begining & an end.
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Marks DTM Calib

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Re: DNA test!
« Reply #3 on: 04 March 2008, 19:09:08 »
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Nothing in this world is 100% except a begining & an end.


and the chance of being taxed....
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Grumpy

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Re: DNA test!
« Reply #4 on: 04 March 2008, 19:09:30 »
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Nothing in this world is 100% except a begining & an end.

Tax also rings a bell.  :(
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Entwood

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Re: DNA test!
« Reply #5 on: 04 March 2008, 19:10:58 »
AFAIK it is not "legally" possible to declare anything as a certainty, where an opinion or interpretation is given. As the DNA evaluation is a comparison it is an interpretation in that sense.

Secondly, from a statistical point of view ( and I hate statistics), the only way a DNA comparison could be quoted as 100% certain is if every single human being in the world, including all dead ones, ever, was recorded and checked against the sample to be excluded. If a single humans DNA was NOT in the sample .. then it is possible ... even if vanishingly unlikely .. that another match "might" have occured ...

so 99.99999% allows for those points ... :)
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Dave-C

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Re: DNA test!
« Reply #6 on: 04 March 2008, 19:12:00 »
Before anyone says it, here in Massive old Stoke we are all related anyway!  Me and Loo Knee are sisters....  ask her, go on ask her!!!!

 ;D ;D ;D ;D
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Do it right, do it once................

Kate

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Re: DNA test!
« Reply #7 on: 04 March 2008, 19:26:12 »
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AFAIK it is not "legally" possible to declare anything as a certainty, where an opinion or interpretation is given. As the DNA evaluation is a comparison it is an interpretation in that sense.

Secondly, from a statistical point of view ( and I hate statistics), the only way a DNA comparison could be quoted as 100% certain is if every single human being in the world, including all dead ones, ever, was recorded and checked against the sample to be excluded. If a single humans DNA was NOT in the sample .. then it is possible ... even if vanishingly unlikely .. that another match "might" have occured ...

so 99.99999% allows for those points ... :)

So would you say some tests are wrong or not?
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Marks DTM Calib

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Re: DNA test!
« Reply #8 on: 04 March 2008, 19:27:47 »
I am 99.9999999% certain that all tests are correct  :y
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Entwood

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Re: DNA test!
« Reply #9 on: 04 March 2008, 19:40:28 »
Quote
Quote
AFAIK it is not "legally" possible to declare anything as a certainty, where an opinion or interpretation is given. As the DNA evaluation is a comparison it is an interpretation in that sense.

Secondly, from a statistical point of view ( and I hate statistics), the only way a DNA comparison could be quoted as 100% certain is if every single human being in the world, including all dead ones, ever, was recorded and checked against the sample to be excluded. If a single humans DNA was NOT in the sample .. then it is possible ... even if vanishingly unlikely .. that another match "might" have occured ...

so 99.99999% allows for those points ... :)

So would you say some tests are wrong or not?

This cannot be stated ...  what can be stated is that, AS FAR AS IT IS KNOWN, no 2 tests done to date have ever been the same.....

Now, conspiracy theoriests will state that those that have been the same have been covered up, anti-scientists will say that there are identical matches but our science is not good enough to find them, supporters will say this proves that no 2 are ever, ever, going to be the same .....

You decide which you wish to believe ..... all I know is ... so far even all the identical twins that have been tested .. and the results published ... have shown minor but detectable differences .. :)
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Kate

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Re: DNA test!
« Reply #10 on: 04 March 2008, 19:51:41 »
Entwood you would make a good politician! ;D
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cem_devecioglu

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Re: DNA test!
« Reply #11 on: 04 March 2008, 20:05:42 »
DNA tests are accurate..Unless people mess up the samples  ;D
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Bandit127

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Re: DNA test!
« Reply #12 on: 04 March 2008, 20:17:54 »
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DNA tests are accurate..Unless people mess up the samples  ;D

Quite - mix them or contaminate them. Reduce the odds from 1 in a million to 1 in 1....

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