w.p.coyne@uk.ac.newcastle (04/10/91)
Semi-Artificial Life
In the 1960's John Gurdon did a nuclear transfer experiment. He took the
nucleii of cells lining the gut of tadpoles of the toad Xenopus and inserted
them into toad eggs from which the nucleii had been effectively removed by
irradiation.
90% died with no development,
6.5% died with some divisions,
2.5% died in the early tadpole stage,
1% reached the adult stage.
I don't know whether those which reached the adult stage lived normal length
lives.
Has this been done with 'higher life-forms' such as humans, apes, pigs, dogs
etc?
It would seen from this that cloning is technologically possible.
.............................................................
Department of Process and Chemical Engineering, +
Newcastle University, United Kingdom. + "If we breed like rabbits,
+ in the long run we have
JANET: W.P.Coyne@uk.ac.newcastle + we have to die like
UUCP : ...!ukc!newcastle.ac.uk!W.P.Coyne + rabbits" Carlson on
ARPA : W.P.Coyne@newcastle.ac.uk + population growth.grr@cbmvax.commodore.com (George Robbins) (04/11/91)
In article <1991Apr10.074432.7267@newcastle.ac.uk> w.p.coyne@uk.ac.newcastle writes: > > Semi-Artificial Life > In the 1960's John Gurdon did a nuclear transfer experiment. He took the > nucleii of cells lining the gut of tadpoles of the toad Xenopus and inserted > them into toad eggs from which the nucleii had been effectively removed by > irradiation. > It would seen from this that cloning is technologically possible. Or that either the experiment concept was flawed or the technique was sufficently crude that most of the eggs were fatally damaged and unable to develop. -- George Robbins - now working for, uucp: {uunet|pyramid|rutgers}!cbmvax!grr but no way officially representing: domain: grr@cbmvax.commodore.com Commodore, Engineering Department phone: 215-431-9349 (only by moonlite)
szabo@crg5.UUCP (Nick Szabo) (04/13/91)
In article <1991Apr10.074432.7267@newcastle.ac.uk> w.p.coyne@uk.ac.newcastle writes: > >...nucleii of cells lining the gut of tadpoles of the toad Xenopus and >inserted them into toad eggs from which the nucleii had been effectively >removed by irradiation. > 90% died with no development, > 6.5% died with some divisions, > 2.5% died in the early tadpole stage, > 1% reached the adult stage. Fine, but how does this compare to the frequencies of viability for normal toad eggs? -- Nick Szabo szabo@sequent.com "If you want oil, drill lots of wells" -- J. Paul Getty The above opinions are my own and not related to those of any organization I may be affiliated with.