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From: email@example.com (nguyen)
Subject: Re: Scientists baffled by increase in autism
Date: 21 Oct 2002 23:18:27 -0700
NNTP-Posting-Date: 22 Oct 2002 06:18:27 GMT
"People's Commissar" wrote in message news: With the genome project done, they really should check for genetic factors
> and see if there are any.
The mapping of the human genome is somewhat overstated. The scientists
involve claim to have mapped the general structure, but have not
identified the role of most of the genes contained in them. In any
case, the problem may not be at a genotype level - especially if it is
a case of a dysfunction in a trait produced by the cooperation of many
A good example is height ... the genetic factors controlling height
have not been identified even absent the effects of nutrition, etc.
Most diseases are not likely going to be the result of single gene
In addition, a recent discovery that retrovirus therapy was the likely
result of triggering a cancer may have a further confusing effect on
genetic studies. In it, it was found that the genes inserted into a
person's DNA likely resulted in causing normally non-cancerous genes
to become cancerous.
This means that tampering with DNA by trying to turn on or off
portions of it with retroviral DNA may actually change the natural
functioning of what the experiment is trying to observe.
This means manipulative studies may not actually reveal natural or
spontaneous genetic functioning or allow scientists to isolate single
In other words, if you change DNA to see what happens ... what happens
is not necessarily what would have happened if you made no change.
A difficult problem for any laboratory genetic manipulation or
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