The germline mutation rate determines the pace of genome evolution and is an evolving
parameter itself. However, little is known about what determines its evolution, as most …

Until recently, the histology and ultrastructural events of spermatogenesis in reptiles were
relatively unknown. Most of the available morphological information focuses on specific …

Spermatogonial stem cells (SSCs) are the germline stem cells that are essential for the
maintenance of spermatogenesis in the testis. However, it has not been sufficiently …

Apoptosis is a tightly controlled process by which tissues eliminate unwanted cells.
Spontaneous germ cell apoptosis in testis has been broadly investigated in mammals that …

This study describes the male reproductive cycle of Sibynomorphus mikanii from
southeastern Brazil considering macroscopic and microscopic variables. Spermatogenesis …

To elucidate the processes involved in the spatial and temporal maturation of spermatogenic
cells in the testes of the soft-shelled turtle, Pelodiscus sinensis, we used a histological …

This chapter is intended to cover morphological data on the testis, spermatogenesis,
ultrastructure of spermiogenesis, and the mature spermatozoon in snakes. Though it would …

During meiotic prophase I, tightly regulated processes take place, from pairing and synapsis
of homologous chromosomes to recombination, which are essential for the generation of …

HMGB2, a member of the high-mobility group (HMG) proteins, was identified as a male-
biased gene and plays a crucial role in the germ cells differentiation of mammals. However …

The annual cytological changes to the male germinal epithelium were investigated in an
introduced population of European wall lizards (Podarcis muralis). Testicular tissues were …