What is replacement model of human evolution

Human evolution is the evolutionary process within the history of primates that led to the emergence of homo sapiens as a distinct species of the hominid family, which includes the great apes.To study the power of our model choice procedure in the context of human evolution, we simulated 1,000 random data sets under the best model for african replacement (afreg), assimilation (aseg), and multiregional (mrebig) models and each time estimated the posterior probability of the three models.According to the african replacement model, anatomically modern humans arose as a new.According to this theory, humans first arose nearly two million years ago and the evolution has been only carried out in a single human species.The multiregional hypothesis model of human evolution (abbreviated mre and known alternatively as regional continuity or polycentric model) argues that our earliest hominid ancestors (specifically homo erectus) evolved in africa and then radiated out into the world.

The rate of change has been measured precisely to an average of 70 bases (out of our 6 billion total) per generation.Starting with mitochondrial eve in 1987, genetics has played an increasingly important role in studies of the last two million years of human evolution.It takes a middle ground and incorporates both of the old models.The replacement hypothesis and mitochondrial eve offer a simple model of human evolution.Multiregional evolution is more complex and difficult to diagram.

African replacement theory most likely model.