Navigation Links
Human brain is still evolving

hat expected by chance, indicating that natural selection has driven up the frequency of the haplogroup. They referred to the high-frequency haplogroup as haplogroup D.

When the researchers compared the ethnic groups in their sample for haplogroup D of ASPM, they found that it occurs more frequently in European and related populations, including Iberians, Basques, Russians, North Africans, Middle Easterners and South Asians. That haplogroup was found at a lower incidence in East Asians, sub-Saharan Africans and New World Indians. For Microcephalin, the researchers found that haplogroup D is more abundant in populations outside of Africa than in populations from sub-Saharan Africa.

To produce more informative statistical data on the frequency of haplotype D among population groups, the researchers applied their methods to a larger population sample of more than one thousand people. That analysis also showed the same distribution of haplogroups.

Their statistical analysis indicated that the Microcephalin haplogroup D appeared about 37,000 years ago, and the ASPM haplogroup D appeared about 5,800 years ago ?both well after the emergence of modern humans about 200,000 years ago. "In the case of Microcephalin, the origin of the new variant coincides with the emergence of culturally modern humans," said Lahn. "And the ASPM new variant originated at a time that coincides with the spread of agriculture, settled cities, and the first record of written language. So, a major question is whether the coincidence between the genetic evolution that we see and the cultural evolution of humans was causative, or did they synergize with each other?"

Lahn said that the geographic origin and circumstances surrounding the spread of the haplogroups can only be surmised at this point. "One can make guesses, but our study doesn't reveal how these positively selected variants arrived," he said. "They may have arisen in Europe or the Middle East and spread more
'"/>

Source:Howard Hughes Medical Institute


Page: 1 2 3 4 5

Related biology news :

1. FDA Approves Human Hookworm Vaccine for Phase I Safety Trials
2. New Clues Add 40,000 Years to Age of Human Species
3. Human Cells Filmed Instantly Messaging for First Time
4. Govt Creates Gene Database of Normal Human Tissues
5. Analysis Of Human Genome To Predict The Development Of Illnesses
6. Human Eggs Can Develop From Ovarian Surface Cells In Vitro
7. Determining The Fate Of Cells In The Human Body
8. Whole genome promoter mapping - Human Genome Project v2.0?
9. Human embryonic stem cells have the potential to develop into eggs and sperm in the laboratory
10. Going To Extremes To Improve Human Health
11. Human cerebellum and cortex age in very different ways
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Human brain still evolving

(Date:12/10/2014)... RALEIGH, N.C. , Dec. 9, 2014  Valencell, ... announced it is seeing a staggering demand from its ... demand, the Company revealed, is not solely coming from ... industries as well. "A wearable is only ... a result, accuracy is the ultimate driver in long-term ...
(Date:12/10/2014)... Dec. 9, 2014 CIE San Diego has ... provides the connective tissue that enhances care coordination among ... easily share client-level information; earned a second $1 million ... organizations serving seniors aging in community and; will be ... December 11 th 4-6p. CIE San ...
(Date:12/10/2014)... 2014     ...   Jifflenow, a leading ... for business-to-business (B2B) events, today announced a partnership ... near-field communication (NFC), Bluetooth low energy (BLE), and ... , Jifflenow will integrate its meeting ...
Breaking Biology News(10 mins):Wearable Technology Products Demand Highly Accurate Biometric Technology 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 3Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 4Jifflenow And ITN International Bring Cutting-Edge Badge Scanning Technology To B2B Events 2Jifflenow And ITN International Bring Cutting-Edge Badge Scanning Technology To B2B Events 3
... BOULDER, Colo., September 11, 2012 BiOptix announced continued support ... in BioWest 2012, a leading life sciences showcase ... City Center. "BiOptix continues to believe in the ... Association, noted Rick Whitcomb, President and CEO of ...
... screening technique developed by researchers at the RIKEN Plant ... novel immune-priming compounds in Arabidopsis plants. Discovery ... plant growth or crop yield, establishes the new technique ... crops from damaging pathogens. Plant activators, compounds that ...
... Mich.A strip of glass covered in hairy nanoparticles can ... system, and other toxic metals in fluids. ... Northwestern University and the University of Michigan found that ... common form of mercury pollution, at unprecedentedly small concentrations. ...
Cached Biology News:BiOptix Participates in Leading Life Sciences Event BioWest 2012 2Screening technique uncovers 5 new plant activator compounds 2Measuring mercury levels: Nano-velcro detects water-borne toxic metals 2Measuring mercury levels: Nano-velcro detects water-borne toxic metals 3
(Date:12/19/2014)... 18, 2014 iLab Solutions, the global ... of Siri Bryant as the new Director of Institutional ... Core Implementations. These two new leadership positions were created ... by ensuring that iLab continues to meet the needs ... four years, iLab has been deployed at over 450 ...
(Date:12/19/2014)... BURLINGTON, Mass. , Dec. 18, 2014  Decision ... dental biomaterial market will grow moderately through ... implant procedures and growing awareness of dental biomaterials all ... underdeveloped markets such as China ... incomes will bring dental procedures within reach for a ...
(Date:12/17/2014)... December 16, 2014 The Activated ... 2013, which is why IBISWorld updated its original industry ... to benefit from an intensified focus on environmental policy. ... new emission standards for power plants and a range ... to IBISWorld Industry Analyst Sarah Kahn, “a range of ...
(Date:12/17/2014)... 17, 2014 Ipsen Biopharmaceuticals, Inc., ... ADR: IPSEY), today announced that Somatuline® ... Somatuline®) was approved by the U.S. Food and ... neuroendocrine tumors (GEP-NETs) in adult patients with unresectable, ... disease to improve progression-free survival (PFS). , “The ...
Breaking Biology Technology:iLab Solutions Announces Two New Leadership Positions to Meet the Needs of Its Growing Customer Base 2Asia Pacific Dental Biomaterial Market Will Grow Strongly Through 2023 2Asia Pacific Dental Biomaterial Market Will Grow Strongly Through 2023 3Activated Carbon Manufacturing in the US Industry Market Research Report Has Been Updated from IBISWorld 2Activated Carbon Manufacturing in the US Industry Market Research Report Has Been Updated from IBISWorld 3Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 2Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 3Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 4Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 5Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 6Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 7Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 8
... are being held to solicit public sentiment on Assembly ... 45 . The bills were introduced to the state legislature ... and parthenogenesis (the process of manipulating the genetic material of ... material from any other cell, in a way that causes ...
... just go bad. Not so often, components that supply power ... case beginning at 11:57 p.m. Monday night with TDS Internet ... and downed dial-up and DSL users en masse, TDS Telecom ... restored at 2:40 a.m. to all users. , ,TDS Internet ...
... determined to give heavy email users something they lack: time and ... a heavy email user, talks about the inspiration for his company, ... world. , , WTN: How much email do you get everyday? ... messages a day from various email accounts with about 70% of ...
Cached Biology Technology:Public Hearing Held for controversial anti-cloning bills 2Public Hearing Held for controversial anti-cloning bills 3Public Hearing Held for controversial anti-cloning bills 4TDS Suffers 29-State System Outage 2TDS Suffers 29-State System Outage 3WTN Interview: Alex Bratton: EmailRX's founder on viruses and spam 2WTN Interview: Alex Bratton: EmailRX's founder on viruses and spam 3
Rabbit polyclonal to KIAA1276 ( Abpromise for all tested applications). entrezGeneID: 27146 SwissProtID: Q9ULE4...
Rabbit polyclonal to IL23 P19 ( Abpromise for all tested applications). Antigen: Synthetic 16 amino acid peptide from near the amino terminus of human IL23 P19 Entrez Gene ID: 51561 Swiss...
Monoclonal Mouse Anti-Human Cytokeratin 16 (48 kD)...
PFM8 Antibody...
Biology Products: