I would formulate that as "...I believe that singularity will be generated by post-humans... And I also believe post-humans will not only be physically and mentally enhanced, but ethics as well." I prefer ethics to morality because ethics is moral philosophy, which means that it treats the issues in question in a rigurous, (soft) scientific manner, as opposed to morality, which each manboon interprets in a different way and which, usually, degenerates or is subverted and made a mockery of by various unscrupulous organizations like organized religions and the like.
I can't say whether or not post-humans will appear before the technological singularity, but I would venture a guess that if they don't appear before, there will be little need for them to appear after. Without the luddites holding science back nowadays, especially in the area of genetics, the chances of post-humans definitely appearing before the singularity would be greatly increased.