Before you make up your mind on the cloning issue, go to the National Bioethics paper and check it out:
http://65.205.1.226/cloning/cloning_report.html
It's 1997, and a bit dated, but the technology/ethics debate is still the same. For a persuasion piece, if you support cloning, check this out:
http://www.humancloning.org/allthe.htm
I know a doctor who is currently cloning pets and attempting to clone humans off-shore in the Carribean. I took a law/science course that included cloning at Dartmouth, which was taught by the Doctor/Professor there that runs their fertility program. I have tons more material if you're interested.
Your essay, technically: Read other comments, including those about general grammar and punctuation. Here is a bit about topic sentences, which you really need help with:
http://www.english.ttu.edu/uwc/topicsen.html
Here is another article that can help you with paragraph structure, again something you could well use:
http://www.uottawa.ca/academic/arts/.../paragrph.html
I might seem condescending, and if you are young I apologize. But, no matter what your age, these are good things to look into.
Best of luck.