Spencer Wells described his study how the genetic markers in humans are being us
ID: 92909 • Letter: S
Question
Spencer Wells described his study how the genetic markers in humans are being used to infer the historical geographical distribution of humans and the dispersal of our ancestors. Explain how the genetic markers on our DNA (from blood samples) helps us understand that history. What are the techniques he is using? What is the nature of the evidence? What are the major conclusions about the journey of our ancestors out of Africa? What were the major migrations of humans to all the other continents? Approximately when did each migration occur and what were the major paths? How does the evidence support these conclusions? What Supporting evidence besides the DNA evidence is being used to support these conclusions?
Explanation / Answer
Genetic markers are identity of a particular species and those sequences are termed genetic markers whose location on DNA (position, chromosome no.) is known. By comparison of frequency of changes and mutation in genetic marker, one can determine the relationship between two species or even population. Thus, study of changes in genetic markers help to trace timing of divergence of two or more population or species.
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