Here's a breakdown:

* Spermatogonia are undifferentiated germ cells found in the seminiferous tubules of the testes.

* They undergo mitosis to produce more spermatogonia, ensuring a continuous supply of precursor cells.

* Some spermatogonia differentiate into primary spermatocytes, which then undergo meiosis to produce sperm cells.

* Meiosis is a specialized type of cell division that results in four haploid sperm cells from each primary spermatocyte.

So, the path from spermatogonium to sperm is:

1. Spermatogonium (undifferentiated germ cell)

2. Primary spermatocyte (undergoes meiosis)

3. Secondary spermatocyte (intermediate stage of meiosis)

4. Spermatid (haploid cell with immature sperm characteristics)

5. Sperm (mature, motile gamete)