Spermatogonia are diploid (2n chromosome number) stem cells that are dormant until puberty, when they undergo mitosis and differentiate into diploid primary spermatocytes.

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Spermatogonia are indeed diploid stem cells that remain dormant until puberty, at which point they undergo mitosis to produce diploid primary spermatocytes, which then continue the process of spermatogenesis.

Spermatogonia Are Diploid (2n Chromosome Number) Stem Cells That Are