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#spermatogenesis

6 public questions tagged with this topic.

Fertilization in mammals-l

Spermatogenesis occurs in:

Spermatogenesis occurs within seminiferous tubules of testis, highly coiled tubules lined by complex stratified epithelium containing spermatogonial stem cells near basement membrane and Sertoli nurse cells spanning to lumen. Spermatogonia proliferate mitotically, type B spermatogonia differentiate into primary spermatocytes entering meiosis. Sertoli cells form blood-testis barrier via tight junctions creating immunoprivileged adluminal compartment where meiosis and spermiogenesis proceed supported by nutrients, hormones testosterone and follicle stimulating hormone. Peritubular myoid cells assist transport toward rete testis, epididymis for maturation, storage and eventual release.

Ref: Gilbert, Developmental Biology, 12th ed., Chapter 19: Spermatogenesis in seminiferous tubules and Sertoli cell support.

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Fertilization in mammals-l

Gametogenesis in mammals primarily occurs through:

Gametogenesis requires combination of mitotic proliferation and meiotic reduction to balance gamete quantity and ploidy. Primordial germ cells and spermatogonial stem cells divide mitotically expanding pool and in males maintaining lifelong production. Subsequent entry into meiosis halves chromosome number via homologous recombination and two sequential divisions, generating genetically diverse haploid spermatids or oocytes. Pure mitosis would retain diploidy incompatible with fertilization restoring diploidy, while meiosis alone without mitotic amplification would insufficiently produce gamete numbers. Dual program ensures both amplification, genetic variability, sustainable fertility across reproductive lifespan and gamete quality.

Ref: Gilbert, Developmental Biology, 12th ed., Chapter 19: Gametogenesis – mitosis and meiosis in mammalian germ cell development.

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Reproductive System

Primary male reproductive organs responsible for spermatogenesis are:

Testes (C) is the right choice. This sits at the heart of Reproductive System: the wording points straight to what is happening in the tissue or organ system. A useful study habit is to ask what the structure or process is for: Testes is the option that correctly names the structure, process, or principle asked for in Reproductive System. That reasoning supports Testes. One solid sentence about why this works is enough for recall — you do not need a long essay for every MCQ. When you practise, cover the choices first, write Testes from memory, then reveal the letter — that habit builds real recall for Reproductive System.

Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.

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