Final answer:
The primary spermatocyte forms sperm cells through the process of meiosis which includes two stages: meiosis I and meiosis II, eventually producing four haploid sperm cells.
Step-by-step explanation:
The primary spermatocyte forms sperm cells by undergoing a specialized type of cell divisions called meiosis.
The process begins with mitosis of a spermatogonial stem cell, resulting in two diploid daughter cells, where one remains as a spermatogonium and the other becomes a primary spermatocyte.
A primary spermatocyte undergoes meiosis I to produce two haploid secondary spermatocytes.
Each secondary spermatocyte then goes through meiosis II to become a spermatid.
These spermatids undergo a transformation process known as spermiogenesis, resulting in mature sperm cells capable of fertilizing an egg. Overall, each primary spermatocyte yields four haploid sperm cells after completing meiosis.