The process of spermatogenesis and spermiogenesis begins with a and ends with four

To complete the statement above:

The process of spermatogenesis and spermiogenesis begins with a germ cell and ends with four gametes. 

Spermiogenesis is the last phase of spermatogenesis, which sees the development of spermatids into developing, motile spermatozoa. The spermatid is a pretty much round cell containing a core, Golgi device, centriole, and mitochondria.

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