Many of the deleterious mutations that Peanuts characters Bills Christmas tree shirt oba catastrophe (they appeared after the geographical expansion of humans, and many are ancestry specific), and there are inbred human populations that do very well even if some genetic diseases are more frequent in those groups than in others.Genetic diversity is not the be all and end all of the survival of a species. Chimps are more genetically diverse than humannd they are not doing as well as humans: they are endangered while we are overpopulating the planet. the issue with lack of genetic diversity is that when the numbers of surviving members of a species goes really low, you add an additional stress on the health of the population, through inbreeding, but also the risk that stochastic environmental events could wipe out the population increases.
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We don’t know how close to extinction we really came after the Peanuts characters Bills Christmas tree shirt It’s not likely that we lost that much genetic diversity at that point, or we would not be where we are. Having said that, it’s impossible to know exactly what was lost until we sequence more ancient genomes. Even with that data in hand, it’s still basically impossible to predict if gene variants that were lost in those ancient humans were critical for anything, and if there was any significant loss in terms of genetic potential.