Skulls of early humans carry signs of inbreedingtags: China, ancestry, human remains
Buried for 100,000 years at Xujiayao in the Nihewan Basin of northern China, the recovered skull pieces of an early human exhibit a now-rare congenital deformation that indicates inbreeding might well have been common among our ancestors, new research from the Chinese Academy of Sciences and Washington University in St. Louis suggests.
The skull, known as Xujiayao 11, has an unusual perforation through the top of the brain case - an enlarged parietal foramen (EPF) or 'hole in the skull' - that is consistent with modern humans diagnosed with a rare genetic mutation in the homeobox genes ALX4 on chromosome 11 and MSX2 on chromosome 5. These specific genetic mutations interfere with bone formation and prevent the closure of small holes in the back of the prenatal braincase, a process that is normally completed within the first five months of fetal development. It occurs in about one out of every 25,000 modern human births....
comments powered by Disqus
- Colorado Students Strip Naked in Protest of ‘Censorship’ of AP History Classes
- They should give this definition of History to all first year undergrads on their first day
- Field Report: What I learned by attending a workshop on Korean history
- Historians suggest ways California can integrate gay history into the school curriculum
- Now it’s Andrew Bacevich’s turn to do a MOOC