Sperm pass through several stages during their development. The earliest stage in which the cell becomes haploid is the

A) sperm.
B) spermatid.
C) primary spermatocyte.
D) secondary spermatocyte.
E) spermatogonium.

Spermatid

An immature male sex cell formed from a spermatocyte that eventually develops into a mature spermatozoon through the process of spermiogenesis.

Primary Spermatocyte

A cell that arises from the division of spermatogonia, undergoing meiosis I to produce two secondary spermatocytes.

Secondary Spermatocyte

A cell produced from the division of a primary spermatocyte during the process of spermatogenesis, which will eventually undergo meiosis II to produce spermatids.