During spermatogenesis, what are the first haploid cells produced?

A) primary spermatocytes
B) spermatogonium
C) spermatids
D) sertoli cells
E) secondary spermatocytes

The first haploid cells produced during spermatogenesis are secondary spermatocytes, which are formed after the first meiotic division of primary spermatocytes. Spermatogonium are diploid stem cells that give rise to primary spermatocytes. Spermatids are haploid cells that are formed after the second meiotic division of secondary spermatocytes. Sertoli cells are supportive cells found in the seminiferous tubules of the testes, but they do not directly produce sperm. Primary spermatocytes are diploid cells that undergo meiosis to produce secondary spermatocytes.