Autopsy
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What is specifically forbidden with verse 4119 is a matter of a long debate. Sunni-Islam answers that kind of questions. Of course, nowadays, genetic manipulation comes into ones mind, because what is more a change of creation than this. Cutting off the ears of an animal is 1. painful for the animal, 2. affects the functioning. And we may not know all the effects the change of creation would have, as in case of genetic manipulation.
But it is also translated with only "slit" the ears of cattle.
In a german translation the word "verunstalten" is used for changing the creation (to disfigure/deform creation).This is another verse which mentions the change of creation
3030 Therefore, stand firm in your devotion to the true Faith, the upright Faith which God created for mankind to embrace. God's Creation cannot be changed. This is surely the right faith, although most men may not know it.