system
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human
ELI5: how do animals that come back from extinction overcome inbreeding problems

This got me interested as I was reading about Diego the tortoise who revived the species from extinction. This may be good and well but what happens to the inbreeding which is said to weaken the genetics of the animals and also magnifying the chances of recessive geenes manifesting.
gpt
They don't. At least not in the short-term. In the short-term they're absolutely will be inbreeding related problems associated with that bottleneck.

In the long-term if the species does survive, it does so because the problematic genes that have been over-represented in the population are slowly culled out by natural selection.

Since that means that the population is going to be less healthy in the short-term, that poses a big problem that can make it even harder to recover from a very low population than it would be otherwise.