Question

Which scientific development has given rise to the most debate about the ethics of tampering with nature?

Answer 1

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The scientific advance that launched an ethical alert in the scientific community was the possibility of cloning animals, since it presents important questions, especially if such a project is extended to humans.
 
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Answer 2

Answer:

Cloning is the process of producing genetically identical organisms either naturally or artificial means. It refers to the process of creating clones or identical copies of a cell, or DNA fragment taken from one organisms with an intention to make numerous organisms. The organisms like plants or animals produced after this process are genetically modified, and exhibit features suitable for the use of human society.

The cloning of animals is against the ethics of the nature: The cloning involves the production of new animal with the use of existing animals by utilizing the genome. The new animal produce may remain sterile, incompetent to survive in the inhabiting environment.