Mitosis and Spermatogenesis Question

[Gauss44]

Can anyone explain the following? I thought that mitosis created cells identical to the parent cell.

WikiPreMed says:

"Undifferentiated germ cells, spermatogonia, undergo mitosis to form primary spermatocytes. These mitotic divisions do not produce exact clones, so primary spermatocytes are somewhat differentiated from spermatogonia."

Link: http://www.wikipremed.com/mcat_course.php?code=0407110102000000

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[sazerac]

Well they must be a little different, because one cell is just like momma, and the other cell decides to do the meiosis thing.

If they both did meiosis the undifferentiated germ cell would be lost forever, and if they both were like momma then nobody would ever do meiosis.