EternalDragon
Counselor
Well it isn't as if we were born directly from flatworms, that way back hundreds of millions of years we had a flatworm ancestor isn't far fetched when you analyze all the species and evolution which occurred between then and now.
First you would need more than a billion years. Much more, to go from simple to complex. If that scenario were true you would need a lot more genetic material to start with.
I would assume it would have the same drawbacks as a bottleneck would.
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