Q: What is responsible for the production of primary spermatocytes?  

Answer: A

Spermatogonia are responsible for the production of primary spermatocytes. Spermatogonia are diploid stem cells that are located on the basement membrane of the seminiferous tubules in the testes. They undergo mitotic cell division to produce more spermatogonia, as well as primary spermatocytes, which are also diploid. The primary spermatocytes then undergo meiosis I to produce haploid secondary spermatocytes. Each secondary spermatocyte then undergoes meiosis II to produce four haploid spermatids that mature into spermatozoa. Spermatogenesis is a complex process that involves the differentiation of spermatogonia into spermatozoa, and it takes place in the seminiferous tubules of the testes.

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