I found such a clause:
The general principle is that mitosis creates somatic cells and meiosis creates germ cells.
However, I cannot agree. Each gametogonium needs to go through mitosis before it can enter meiosis I. So in that case mitosis is happening with germ cells so the clause is false.
I would rephrase the sentence to be
The general principle is that meiosis creates only germ cells with the possibility of a decrease in chromosome number, while mitosis can create both somatic and germ cells while the ploidy stays constant.
Ok, not perfect.
How would you say the main general difference between mitosis and meiosis?