Human Migration

Question 1

What is the ‘African Eve’ theory?

Answer 1

The ‘African Eve’ theory States that all people today can there in inheritance back to one female he lived in Africa between 130,000 and 200,000 years ago

Question 2

How has climate change affected human migration?

Answer 2

• In the ice age more water was frozen in glaciers and ice caps so sea levels were lower. This allowed humans to walk between places that are separated by water today, e.g. From Africa to Asia
• Low sea levels around 25,000 years ago meant that humans could walk from Siberia in Asia across into North America
• At the end of the ice-age humans migrated north as the land became inhabitable

Question 3

Where is mitochondrial DNA found?

Answer 3

Mitochondrial DNA is found inside mitochondrial cells

Question 4

What are the differences between Nuclear DNA compared to Mitochondrial DNA?

Answer 4

• Easier to extract than nuclear DNA as it is more abundant
• Only passed from mother to child
• It is less likely to degrade in fossils than nuclear DNA
• It has a higher rate of mutation than nuclear DNA so more differences between people