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Question

Efforts to repeat the cloning of Dolly (the sheep) have been unsuccessful. The scientists who claim to have cloned Dolly have been challenged to produce additional evidence that Dolly is really derived from an adult cell (an originally claimed), rather than a foetal cell which might have contaminated the experiment (as the sceplor suggest). Which of the following could provide evidence that Dolly was created from an adult cell, rather than a foetal cell?

A
Dolly's DNA fingerprints
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B
The heterozygosity of random pieces of Dolly's DNA
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C
The melting point of Dolly's DNA
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D
The length of Dolly's telomeres
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Solution

The correct option is A Dolly's DNA fingerprints
Dolly was important because she was the first mammal to be cloned from an adult cell. Her birth proved that specialised cells could be used to create an exact copy of the animal they came from. Dolly's DNA fingerprints could provide evidence that Dolly was created from an adult cell.
So the correct answer is 'Dolly's DNA fingerprint'.

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