Science Buddies: "Ask an Expert"

Assuming that the Silurian hypothesis is true. Let's say that there once eon's ago existed an advanced civilization not related to the genus Homo.

Let's say like us they genetically manipulated plants and animals, via selective breeding and direct genetic modification like crisper for example. Given enough time all material traces of such civilization will be erased except for plants and animals that have survived this hypothetical scenario.

Could we if we analyze the genome of plants and animals, recognize artificial selection or direct manipulation of the genetic material? Or would it just look like random mutations?

Could we look at the genome and see a clear pattern that suggests artificial manipulation? If genetic manipulation is readable in the genome, is it a credible way to confirm the Silurian hypothesis?

Thanks in advance for the brilliant mind that is willing to answer my silly questions.

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