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Author Topic: Cloning  (Read 11377 times)

Offline Quantumcat

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Re: Cloning
« Reply #25 on: 23/02/2004 10:44:14 »
Well, twins aren't clones, because one wasn't made from the other, but they share genetic material like a clone, because both parents gave exactly the same genes to them as the other ... And they already do artificial baby-making now don't they? they take an egg and a sperm and introduce them ...  then in a few weeks implant it in the mother. At least that's what I thought.

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Offline tweener

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Re: Cloning
« Reply #26 on: 23/02/2004 19:34:31 »
Jay,
In talking about couples benefit from a cloned offspring, I meant that the offspring would be a clone of one of them (or maybe someone else).  They would still have a child to raise, which is presumably what they wanted.  I know that they wouldn't both contribute DNA or it wouldn't be a clone.  Then it would be in-vitro fertilization.  And, if I remember correctly, IVF caused almost as much hoopla when it was new as cloning is causing now.  

I just hope that the conservatives (aka religious fanatics) can't bully their way on this issue.  Someone in some country will press ahead, and I think it would be better to lead the way rather than follow.  But we (the USA) seem to be following more and more lately.

And QC you are absolutely right!


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Offline Ylide

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Re: Cloning
« Reply #27 on: 24/02/2004 07:31:00 »
Ah, thanks for clarifying, John.  I was misinterpreting what you were saying.  

The Bible-thumpers always manage to muscle their way into any research that involves the creation of human life.  They have the market cornered on divinity and they'll eat their shoes before they'll mankind demonstrate the ability to make life as their God supposedly did.



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Offline tweener

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Re: Cloning
« Reply #28 on: 24/02/2004 19:16:42 »
I wish they would eat their shoes.  They are usually too busy trying to shove them down someone else's throat.


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Offline chris

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Re: Cloning
« Reply #29 on: 25/02/2004 08:17:35 »
Definition of "Clone" (from Google online dictionary)

1. A segment of DNA contained within a cloning vector.
2. An organism derived from a founding individual by asexual means that is genetically identical to the founding individual.

Technically speaking I would argue that identical twins are "clones" because a single fertilised embryo - the founding individual - splits to give rise to a second genetically identical individual. Twins therefore fit the definition.

It is worth bearing in mind that the present-day clones that we have been creating are not actually genuine clones. There are subtle differences between these specimens and a pair of twins.

All clones start with an enucleated egg (an egg from which the nucleus has been artificially removed). The reason for doing this is that egg cells contain the necessary machinery (mitochondria) for making energy in the new cells. But more significantly, eggs also contain specially primed cytoplasm (the liquid part of the cell) that can re-activate the developmental programme in DNA that guides embryonic development. This programme is shut off in adult cells and for good reason - because it shares some of the same mechanisms as cancer - rapid and invasive cell growth. We don't yet know the identity of many of these chemical factors that can re-awaken DNA that has been shut-off, which is why we need to rely on eggs to do the job for us.

Now, if the egg you use to make your clone is one of your own then you can expect to produce a genuine clone of yourself. But if, as frequently is the case, the egg you use is not one of your own - then the result will not be a geunine clone - because the mitochondria in each of the clone's cells will be derived from the original egg, and mitochondria contain their own genetic material.

To change the subject completely, you are absolutely right to question the role of DNA in guiding your behaviour and development. Our brains are products of our experiences with the best example being 2 identical twins separated at birth and raised in different countries. One would grow up speaking say French, and the other German or English. This is an example of how 2 genetically identical individuals would behave differently due to different life experiences.

I have covered much of this, and some more belt-and-braces cloning considerations in this article :

http://www.thenakedscientists.com/HTML/articles/article/chrissmithcolumn.htm

Chris


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Offline tweener

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Re: Cloning
« Reply #30 on: 25/02/2004 20:29:37 »
Chris, it is good to see you posting again!

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Offline bezoar

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Re: Cloning
« Reply #31 on: 26/02/2004 05:21:10 »
I'll second that!  Missed you Chris.  Good to have you back.
 

Offline christianchick

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Re: Cloning
« Reply #32 on: 26/03/2004 14:16:24 »
i think it should be banned only because of the natural desire in man to always want more, and because i want identity theft to stay with my credit card and ss#, not with my entire self

i have been here longer yet you seem to be more advanced...
 

Offline Quantumcat

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Re: Cloning
« Reply #33 on: 27/03/2004 11:20:07 »
WHat the heck????

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Offline MayoFlyFarmer

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Re: Cloning
« Reply #34 on: 27/03/2004 19:13:34 »
its far fetched, but it does make sense

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Re: Cloning
« Reply #34 on: 27/03/2004 19:13:34 »

 

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