am 13. Juli 2013
Did you ever wonder where America's genetic heritage came from? I remember years ago asking a representative of an Indian organization if anyone know just what proportion of America's ancestry Indians provided. She did not know but "DNA USA" gives us a hint at the answer to this and other questions.
Author Bryan Sykes explains the science of DNA, as to how it is tested, what it can tell and some interesting facts regarding how we came to be who we are. That ground work having been laid, Sykes takes us through his investigations of various regional ethnic groups, including Indians, white New Englanders, white Southerners and African-Americans, testing their paternal, maternal and composite genetic maps.
The author arrives at some interesting conclusions. Many people have diverse backgrounds. Many Indians find that they have more African and European DNA than Indian. Most African-Americans have some European DNA and among American whites, African DNA is most commonly found among Southerners and least often among the descendents of New England colonialists. The ultimate conclusion is that group identities are really fictions imposed on people of generally diverse genetic backgrounds.
I find the topic of the book to be very interesting although at times the science gets a bit hard to follow. Sykes raises questions about the use of DNA both for possible social purposes and for medical treatment, particularly that fine tuned to presumed racial variables. If you wish to delve into this new frontier in scientific/social research "DNA USA" is a good place to start.