Case study: pick anything you like to clone (product cloning ) in mammalian cell

I have to write a case study (1000 words maximum).
The number of reference its not definite but i think 5 its ok.
The topic in cloning anything i like in mammalian cell (product cloning ) and i have to go through steps involve in cloning.
I dont have any topic in particular,,so if you could help me in picking a topic and write the case study..ill appreciate it.Its due to the 15 of November but i want to receive it two days before.