Science Notebook - Student Edition

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Section 16.3 Human Ancestry (continued)

Emergence of

Modern Humans

I found this information

on page.

Rephrase two hypotheses proposed to explain the global

dominance of modern humans.

Multiregional evolution model:

“Out of Africa” hypothesis:

Summarize a scientific study that supported the “Out of Africa”

hypothesis by completing the paragraph.

• Africans have the most
  variation in mitochondrial DNA
  
  
  • mitochondrial DNA is inherited
    only from the mother
  
  
  
  


• mitochondrial DNA changes
  very little over time
  
  
  • the population with the most
    variation had the longest
    existence
    Because ,
    scientists reasoned that
    . In studying the DNA of contemporary
    humans, scientists found that
    . Because
    , scientists concluded that
    H. sapiens emerged in Africa from a hypothetical “Mitochondrial Eve.”
  
  
  
  

168 Primate Evolution

Contrast Homo sapiens to all other Homo species.

(^) SUMMARIZE