Here's why:

* Haploid organisms have only one set of chromosomes (n).

* Gametes are reproductive cells (sperm and egg) that are also haploid.

* Mitosis is a process of cell division that produces two identical daughter cells with the same number of chromosomes as the parent cell.

Therefore, in a haploid organism, mitosis can directly produce gametes that are genetically identical to the parent cell.

Note: This is in contrast to diploid organisms, where gametes are produced by meiosis, a process that reduces the number of chromosomes by half.