March 25, 2013
Elderly Human “Y” Chromosome
The unearthing and examination of a tremendously infrequent African American “Y” chromosome goes back in time with regards to the most recent common ancestor for the “Y” chromosome ancestry to 338,000 years ago. This period exists even older than the age of the most eldest known structurally contemporary human fossils. University of Arizona geneticists have revealed the most ancient known hereditary subdivision of the human “Y” chromosome -- the genetic factor which determines the male sex. The new differing pedigree, which was discovered in a male human being who presented his DNA to “Family Tree DNA”, a company which concentrates on DNA investigation to locate family roots, separated from the “Y” chromosome tree before the very first presence of physically current individuals in the record of fossils. These effects are printed in the American Journal of Human Genetics. Michael Hammer of the University of Arizona’s department of ecology and evolutionary biology stated that, "Our analysis indicates this lineage diverged from previously known Y chromosomes about 338,000 ago, a time when anatomically modern humans had not yet evolved. This pushes back the time the last common Y chromosome ancestor lived by almost 70 percent." Dissimilar to the added human chromosomes, the common “Y” chromosome doesn’t barter heritable information with other chromosomes; this makes it a lot more straightforward and scientists can truly discover familial associations amid modern ancestries. If two “Y” chromosomes transmit an identical mutation, it is most likely since they divide a communal forefather at some particular period in the precedent. The further mutations which differ amongst two Y chromosomes, the farther back in history the mutual antecedent existed. Initially, a DNA sample acquired from an African American existing in South Carolina was succumbed to the National Geographic...