It's a sensitive subject. The cloning debate attracts quite passionate objections from people. Commonly heard arguments against cloning include:
- Just because we can, does it mean we should?
- A very large percentage of cloning efforts end in failure. For example, it took 277 attempts to clone Dolly the sheep.
- Clones that do survive often have fatal or problem causing issues in their genes.
- Cloning will create a black market for stolen or discarded embryos.
- Cloning will stop genetic improvements to a species. This is because genetic improvements usually occur through sexual reproduction, which result in a mixing of the genes of the mother and father.
- If we try to clone endangered species, then we will put at risk the females of that species.