Spermatogenesis is the formation of sperm in seminiferous tubules of testis.
It has two stages :
(i) Formation of Spermatids
(ii) Spermiogenesis.
In the formation of spermatids, the sperm mother cells or Spermatogonia produce spermatids and in spermiogenesis, the spermatids are transformed into sperms or spermatozoan. At the time of sexual maturity, the primary germ cells divide mitotically to form a large number of spermatogonia which later on grow in size and form primary spermatocytes. The primary spermatocyte undergo meiosis-I to produce small haploid secondary spermatocytes which divide by meiosis II to folm spermatids. The spermatids under the influence FSH is metamorphosed into spermatozoa.
The schematic representation of spermatogenesis is given below :
Chromosome number per cell
