catallaxy files

catallaxy in technical exile

Some gene links

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Two interesting genetics items via the original and spinoff GNXP blogs:

1) first European-American descendant of Genghis Khan discovered and he is [drumroll] a Professor of Accounting

A  British research firm recently combed 25,000 DNA samples searching for a modern descendant of Genghis Khan from outside the Mongolian warlord’s ancient empire.

They found one: a University of Miami accounting professor.

Tom Robinson, a 48-year-old Palmetto Bay, Fla., resident, has taken the odd news with amiable modesty, even though the Mongolian ambassador to the United States plans to invite him as an honored guest to his Washington embassy …

Despite their disparate lifestyles, the link is backed by strong genetic evidence, according to Bryan Sykes, an Oxford University geneticist who conducted the research for his private company, Oxford Ancestors. Robinson’s Y chromosome bears seven of nine genetic markers identical to the Genghis genetic signature — remarkably close considering the two men lived more than 700 years apart, Sykes said.

The Genghis genetic mark was discovered in 2003 by a group of 23 international geneticists who found that 8 percent of all males in large parts of Asia carry startlingly similar genetic markers …

Though Genghis is believed to have 16 million Asian descendants, Robinson is the first Caucasian linked to the 13th-century marauder, Sykes said. How those genes made it to Robinson’s ancestral home near the Scottish border remains a mystery.

2) Neanderthal genetic diversity:

:

The cohabitation of Neandertals and modern humans in Europe about 35,000 years ago has stimulated considerable debate regarding hypothetical admixture. Recently, sequences of the hypervariable region-1 (HVR-1) of mitochondrial DNA (mtDNA) from 9 Neandertal specimens dated between 29,000 and 42,000 years ago from dispersed locations have revealed the genetic diversity of Neandertals around the time of the cohabitation 1, 2, 3 and 4. The genetic signatures before and after contact with modern humans were found to be similar. They fall outside the range of modern human genetic diversity and show no specific affinity with modern or Paleolithic Europeans [5]. Such observations are generally taken as strong evidence for the ‘Rapid replacement’ model for the origin of modern humans 4 and 6, though further evidence is needed to completely exclude admixture.

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Written by Admin

June 7, 2006 at 12:24 am

Posted in Uncategorized

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