Albeit anatomical and histological differences are obvious between cystic and epithelial arrangements of spermatogenesis, the basic organizational features of germ cells is similar. In all species male germ cell differentiation is initiated with a differentiating mitotic division of duplets or small chains (2-16 cells) of undifferentiated A Spermatogenesis, the origin and development of sperm cells within the male reproductive organs, the testes. Sperm are produced specifically from stem cells in the walls of the seminiferous tubules. Learn about the processes of sperm cell production and maturation with this article. ADVERTISEMENTS: Some of the major differences between spermatogenesis and oogenesis in human are as follows: Spermatogenesis: 1. It occurs in the testes. ADVERTISEMENTS: 2. Spermatogonia change to primary spermato­cytes. 3. A primary spermatocyte divides to form two secondary spermatocytes. 4. A secondary spermatocyte divides to form two spermatids. 5. No polar body is formed. ADVERTISEMENTS Although the differences in morphology between mouse SSPCs and differentiating spermatogonia are subtle, they diverge in pattern of gene expression. Therefore separation of these two populations by surface antigen expression (such as KIT, only present in the latter) followed by flow cytometry is highly efficient (Shinohara et al. 1999 ; Kubota Spermatogenesis is a complex process regulated by a multitude of genes. The identification and characterization of male-germ-cell-specific genes is crucial to understanding the mechanisms through which the cells develop. The term "TEX gene" was coined by Wang et al. (Nat Genet. 2001; 27: 422-6) after they used cDNA suppression subtractive hybridization (SSH) to identify new transcripts Although the process of spermatogenesis from type A spermatogonia to mature spermatozoa in mice is 35 days , nearly twice as long as necessary to differentiate into donor spermatozoa following transplantation . The reason for the difference of 35 days versus 2 months remains unclear, but the migration and colonization processes from the lumen Spermatogenesis is the process by which male primary sperm cells undergo meiosis and produce a number of cells calls spermatogonia, from which the primary spermatocytes are derived. Each primary spermatocyte divides into two secondary spermatocytes and each secondary spermatocyte into two spermatids or young spermatozoa. Spermatogonia initiate spermatogenesis by undergoing mitosis. From: Oxidants, Antioxidants and Impact of the Oxidative Status in Male Reproduction, 2019. The difference in the sensitivity to RA between Stra8 and Meiosin loci may be accounted for at least in part by DMRT1-mediated repressive mechanism. ISTF.