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What are the multiregional and out-of-Africa hypotheses, and what are their respective predictions about the common ancestor of all humans that are living today?

   What are the multiregional and out-of-Africa hypotheses, and what are their respective predictions about the common ancestor of all humans that are living today?

Biology: How Life Works

Biology: How Life Works

James Morris, Daniel… 3rd Edition

Chapter 23, Problem 4

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Solved by Expert Vivek Singh

02/16/2022

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This hypothesis posits that different human populations have evolved independently in multiple regions around the world from their local Homo erectus populations. This would mean that the common ancestor of all humans living today would be a Homo erectus Show more…

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What are the multiregional and out-of-Africa hypotheses, and what are their respective predictions about the common ancestor of all humans that are living today?

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Key Concepts

Out-of-Africa Hypothesis

This hypothesis argues that modern humans originated in Africa as a single population before migrating out to populate the rest of the world. It predicts that all living humans share a relatively recent common ancestor from this African population, implying that the genetic makeup of all non-African populations is derived from a subset of this original group, replacing or assimilating local archaic human species.

Multiregional Hypothesis

This hypothesis proposes that modern humans evolved in several regions concurrently from local populations of archaic humans over an extended period, with sufficient gene flow among regions so that, despite regional differences, the human species remained cohesive. It predicts that the ancestry of modern humans is derived from these widespread, intertwined lineages, each contributing regional genetic signatures and suggesting a more complex, polycentric origin for the common ancestor.

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