The correct characteristic of mitosis from the options provided is:
D: Results in two identical daughter cells
Mitosis is a type of cell division that results in two identical daughter cells, each with the same number of chromosomes as the original cell.
To elaborate on the other options: A: Mitosis occurs in somatic cells, but it can also happen in other types of cells, such as certain stem cells. B: The production of gametes (sperm and egg cells) occurs through meiosis, not mitosis. C: Mitosis does not reduce the chromosome number; rather, it maintains the same chromosome number in the daughter cells.
Therefore, the most appropriate answer is D.