Originally posted by: kappamaki
I just wanted to point out a fallacy of one of your arguments. We don't know if the sharingan is a recessive trait. Just because it shows up in a minority of the Uchiha family doesn't make it reccessive. As an example: in my extended family, only a few people have brown eyes. The majority has blue eyes. Does that make brown eyes a recessive trait? No. It just means that, in this case, the recessive trait has proliferated itself enough to be found in the majority. This actually happens in a lot of families.
Similarly, in the Uchiha clan, only a few people have the sharingan. Does that make the sharingan a recessive trait? Not necessarily, although it is more likely. So you can't assume the sharingan is recessive or dominant.