Do you think whether biochemical markers of somatic and germ cells of animal system(s) are similar or not ?
In research area it is very difficult to assess whether any answer is correct or not, but each and every answer concerning with a problem provides clue to proceed along the platform to approach the goal.
I guess the answer depends on the precise nature of your question. If you're comparing animal systems, then yes, there are strong evolutionary links. If you're comparing somatic vs. germ cells, then that's a different issue. Compare the developmental origins of germ cells vs. somatic cells. The germ cell lineage is often separated from the rest of the embryo very early in development in many species, from Drosophila to humans. They undergo reprogramming and erase imprints, unlike many somatic sells. Germ cells have distinct transcriptional programs to initiate differentiation compared to somatic cells.
In practice, there are many markers used to distinguish somatic from germ cells, Vasa, being an example.
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