I would think engineering a person solely for the purpose of being used is completely unjust (utilitarian in that the worth of a person is then determined solely by what it can do). Using cloning as a means to continue the species seems foolish, since an unchanging system would fall prey to disease, defects, etc. It also seems a little off to me just because this isn't exactly "perfected" yet, and one might worry about "mistakes."
I'm 100% sure that isn't the case. I've heard the idea that the Church teaches this before, but I'm not sure where this idea started. It is respected as a part of you, and a special part due to what it is (half your genetic material, and part of the procreative process). It is not held in the same regard as a human, since it isn't. Certain things are not considered okay, such as donating sperm, etc. I could discuss at length, but at the risk of derailing the thread.
Steal my dreams and sell them back to me.....