Archive Pages Design$type=blogging

Ghost DNA Shows Human Ancestors Interbred With Mysterious Unknown Hominins

DNA ancestry tests were a popular Christmas gift in 2018 but not so much during the 2019 holidays, according to the latest reports. While ...

>

DNA ancestry tests were a popular Christmas gift in 2018 but not so much during the 2019 holidays, according to the latest reports. While the general public (at least in the U.S.) have moved on to the next shiny object (concerned about the privacy and lack of real usefulness of the tests), a group of West Africans who participated in a worldwide genome project searching for evidence of ancient ancestors in modern humans learned that they possess a “ghost DNA” of a mysterious, ancient hominin … one who apparently had a lot of interbreeding relations with the ancestors of modern humans. Could this explain everything? Anything? Will it help sales of DNA tests?

“While introgression from Neanderthals and Denisovans has been documented in modern humans outside Africa, the contribution of archaic hominins to the genetic variation of present-day Africans remains poorly understood. We provide complementary lines of evidence for archaic introgression into four West African populations. Our analyses of site frequency spectra indicate that these populations derive 2 to 19% of their genetic ancestry from an archaic population that diverged before the split of Neanderthals and modern humans.”

In a study published in the journal Science Advances, Sriram Sankararaman, an assistant professor at UCLA in the Computer Science and Human Genetics departments, explains how he and his team examined the genomes of 405 West Africans currently living in Nigeria, Gambia, and Sierra Leone using DNA in collected between 2008 and 2015 as part of the 1,000 Genomes project to find genetic variants with frequencies of at least 1% in the populations studied. While they knew that modern West Africans do not have any Neanderthal or Denisovan ancestry, they were shocked to find a single mysterious ancient hominin whose DNA made up as much as 19% of the genes of those tested.

“We don’t have a clear identity for this archaic group. That’s why we use the term ‘ghost.’ It doesn’t seem to be particularly closely related to the groups from which we have genome sequences from.”

Sankararaman told NPR this interbreeding occurred about 50,000 years ago, after humans and Neanderthals split and the latter left for Europe. The ghost group then split of from humans and did some interbreeding before they disappeared, either becoming extinct or being completely assimilated into the human group. Some of the West Africans tested showed minute percentages of Neanderthal DNA, but the researchers believe this came from later Neanderthals who moved back to Africa or modern humans who have interbred with Neanderthals in Europe and then returned to Africa. That’s a LOT of interbreeding. Does it mean anything?

“Are they just randomly floating in our genomes? Do they have any kind of adaptive benefits? Do they have deleterious consequences? Those are all questions which would be fantastic to start thinking about.”

According to his interview in Inverse, Sankararaman isn’t sure. In fact, he’s uncertain if this was one ghost group or many, nor does he know what happened to them. Unlike the Neanderthals and Denisovans, fossil evidence of these species has not been found – even in fossil-rich Africa where so many remnants of ancient human ancestors have been discovered.

A skull would help

What’s known for certain from this ghost DNA Is that this mysterious group played a big part in the early history of at least four groups of modern West Africans. That’s the kind of information that made DNA testing interesting to begin with.

Would you want to find out your ancestors were a mysterious group that liked to play the ancient field?

COMMENTS

Loading...
Name

Âm Nhạc Ẩm Thực Angela Phương Trinh Angelina Jolie Bảo Thy benh-gan Bộ Ảnh - Video Brad Pitt Bùa Ngải Bước Nhảy Hoàn Vũ cac-benh-ve-gan Cao Thái Sơn Chi Pu Chuyện chỉ có ở Trung Quốc Chuyện kỳ lạ về trẻ em Chuyện Lạ Chuyện lạ bốn phương chọn lọc Chuyện lạ cảm động về các loài vật Chuyện lạ khó tin nhưng lại có thật Chuyện lạ ở Nhật Bản Chuyện lạ thế giới khó tin nhưng có thật Chuyện lạ về các loài vật Chuyện lạ về các tài năng hiếm có Chuyện lạ về chó và mèo Chuyện lạ về du lịch Chuyện lạ về hôn nhân - vợ chồng Chuyện lạ về những kỷ lục giảm cân Chuyện lạ về sữa Chuyện lạ Việt Nam có thật Cine Cộng Đồng Mạng Công Nghệ Cung Hoàng Đạo Cường Đô La Đàm Vĩnh Hưng Đàn Ông Đặng Thu Thảo dang-mieng Đĩa Bay Diễm My 9x Điện Ảnh Diệp Lâm Anh Đỗ Mạnh Cường Đời Sống doi-song Đông Nhi Đồng Tính Động Vật Du Lịch Đức Phúc fashion Gay Giảm cân Giáo Dục Giới Trẻ Hồ Ngọc Hà Hoa Hậu Hòa Minzy Hoài Linh Hoàng Thùy Linh Học Tiếng Anh hoc-duong Hot News HotNews Hương Giang Idol Hương Tràm Huỳnh Hiểu Minh Issac Jennifer Phạm Jessica Minh Anh Kenbi Khánh Phạm Khám Phá kham-pha Khánh Hiền Khmer News khoa-hoc khoa-hoc-cong-nghe Khoảnh Khắc Lan Khuê Lazada Lê Xuân Tiền Lều Phương Anh Linh Nga Lý Hải Mai Phương Thúy Maria Ozawa Mẹo Vặt Midu Minh Hằng Miu Lê Món ngon mỗi ngày Mọt Phim Musik Mỹ Linh Mỹ Tâm News Ngô Kiến Huy Ngọc Trinh Người ngoài hành tinh Nhật Kim Anh Những chuyện kỳ quặc trên thế giới Những hiện tượng bí ẩn và khó hiểu Những người có khả năng đặc biệt Noo Phước Thịnh Ốc Thanh Vân oto-xe-may Phạm Băng Băng Phạm Hương Phẫu Thuật Thẩm Mỹ Phong cách Phượng Channel Pokémon Go Quang Dũng Sao Shopping Sĩ Thanh Sơn Tùng M-TP sport Star Sức Khỏe suc-khoe suc-khoe-gioi-tinh Tâm Linh Tâm Sự Tăng Thanh Hà Taylor Swift Thanh Hằng Thành Lộc Thanh Thảo The Face - Gương mặt thương hiệu Thể Hình The Remix – Hòa Âm Ánh Sáng the-gioi Thời Trang Thu Minh Thu Phương Thượng Ẩn Thúy Nga Tin Nổi Bật Tin Nóng Tin Thế Giới Tin Trong Nước Tình Yêu Tom Cruise Trà Ngọc Hằng Trấn Thành Trường Giang Trương Nam Thành Tử Vi tv-show UFO Ung Thư Video Việt Hương Vietnam's Next Top Model Vĩnh Thụy Võ Cảnh Võ Hoàng Yến Vũ Khắc Tiệp Vũ Ngọc Anh Vũ Ngọc Đãng xa-hoi xe xo-gan Xu Hướng - Làm Đẹp
false
ltr
item
GIẢI TRÍ SAO 24H: Ghost DNA Shows Human Ancestors Interbred With Mysterious Unknown Hominins
Ghost DNA Shows Human Ancestors Interbred With Mysterious Unknown Hominins
https://mysteriousuniverse.org/wp-content/uploads/2019/03/dna-3598439_1920-643x440.jpg
GIẢI TRÍ SAO 24H
https://www.giaitrisao24h.com/2020/02/ghost-dna-shows-human-ancestors.html
https://www.giaitrisao24h.com/
https://www.giaitrisao24h.com/
https://www.giaitrisao24h.com/2020/02/ghost-dna-shows-human-ancestors.html
true
5412201294335186192
UTF-8
Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All BÀI CÙNG CHỦ ĐỀ LABEL ARCHIVE SEARCH Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago