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How do you suppose they would replicate the gut biome if they were to clone a human?

It's a good question. There are many ways to clone a human. If you're implanting the cloned embryo in another human, I'm pretty sure the gut biome will develop automatically via the surrogate mother transferring nutrients to the baby. 

I would assume if we developed some "artificial womb" instead, the gut biome would develop based upon whatever is fed to the developing baby via the umbilical cord. You could include probiotics in the feeding.

It's not all that different from some of the issues we have today with overprescription of antibiotics. One of the side effects of taking antibiotics is that it plays hell with your gut biome. However, the gut biome will naturally (& possibly with the help of probiotics) recover over time via mere exposure to the environment and ingesting food. 

Bear in mind--I'm an electrical engineer, not a biologist. So it's possible everything I just wrote is a woefully inadequate and partially or fully inaccurate description of how any of this works. 

Possibly faster depending on how limited our ability as humans to digest food would be impacted by the die-off of our gut biomes. Could be extinction of the human species due to malnourishment and starvation in a matter of weeks.

Pretty sure all living things, not just us, would go to (biological) hell pretty quickly.  A disappearance/death of unicellular organisms would have apocalyptic affects on the food chain, all the way up.  

I'm no environmental scientist, but I feel like we covered this enough during the many science classes I took in school.  

Indeed, Texas is super risky, don't move here.

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I’m not a biologist. 

Snow predicted for much of Tx next week. 1-3”. And 20’s. 

just gotta hunker down Sunday and Monday
then it's pretty nice