The nucleus of a fertilized egg can be removed in the laboratory and replaced wi

Question

The nucleus of a fertilized egg can be removed in the laboratory and replaced with the specially treated nucleus from a body cell which has had its epigenetic tags removed. The egg will then go on to develop just like a normal fertilized egg if implanted into the uterus of a female of the same species. This creates a new individual who is genetically identical to the body cell--they are a clone. This is how Dolly the sheep was first cloned and many other animals since. "Should this technique be used to try to bring back extinct species such as a mammoth or even a dinosaur, provided you could get the DNA? Or how about Einstein---his brain is in a jar? Would he still be Einstein if he was a clone?"

Explanation / Answer

Could clone technique be used to bring dinosaurs and mammoth back from extinction?

No.

- There are two ways for this: -
            (a) cloning from DNA
              (b)reverse-engineering
(a)Cloning:-
              -Cloning requires complete, functional DNA.
              -This is not available for dinosaurs.
              -Under the best natural conditions conceivable, readable DNA is expected to last a couple million years, which is a far from the Mesozoic dinosaurs.
              -Even DNA samples get from mammoths and other Ice Age species are incomplete, and thus cannot be used for Cloning

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