A Reproductive Lexicon


Ownership of this website has been transferred from Northwestern University to Michigan State University.
Please note that some site information may be inaccurate while adjustments to reflect this organizational change are made.

MOOC Advertisement

Learn More:
Get An Introduction to Reproduction

Learn more about the science of reproduction. Dr. Teresa Woodruff, creator of Repropedia, is offering a free online course exploring the world of reproduction.

Get Started!


A spermatocyte is a male germ cell that is going through the process of meiosis. Recombination of genetic material between homologous chromosomes (crossing over) occurs in each primary spermatocyte, which will then divide to produce two haploid secondary spermatocytes. Each secondary spermatocyte divides again to produce a total of four spermatids.