macjas wrote:
Some anthropologists believe that the genetic homogeneity evident in the world's people is the result of a "populationbottleneck"-at some time in the past our ancestors suffered an event, greatly reducing their numbers and thus our genetic variation.
A at some time in the past our ancestors suffered an event, greatly reducing their numbers
B that at some time in the past our ancestors suffered an event that greatly reduced their numbers
C that sometime in the past our ancestors suffered
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