This is a great question and I am sure that there will be a lot of ethical questions in the future. Perhaps the greatest ethical question surrounds the issue cloning. Scientists have been able to clone certain animals already. The list is rather long and impressive - fish, sheep, cattle and many more. This means the next question concerns the cloning of humans.
Generally speaking human cloning involves two types: therapeutic cloning and reproductive cloning. The former aims to transplant organs and the like in the case of damage, and the latter actually concerns making humans.
The questions abound. Do we have the right to play God? What will happen if something goes wrong? Will this cloned human have a soul? Who will have this right? Will it be only for the rich? The questions can be multiplied, and there are no easy anwers.