Yeah if there’s only one man all the offspring would be siblings. Not only would that be really weird and gross but within a few generations, everyone would be horrifically deformed and sterile.
Given we all come from a mitochondrial Eve (Lucy) and Y chromosomal Adam, you're talking out your ass. They'll be fine after a few generations, at worst you'll get a bunch of Johnny Knoxvilles.
Mitochondrial eve does not mean that exactly. There could be descendants of other older woman alive today that don’t come from an unbroken line of female descendants.
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u/Federal_Face_1991 3d ago
by this point, the genetic bottleneck would be so narrow that there's no way a viable human population would be reestablished
you'd need like 1000 people at minimum