News tagged with common ancestor

Related topics: genome

King Tut and half of European men share DNA

According to a group of geneticists in Switzerland from iGENEA, the DNA genealogy center, as many as half of all European men and 70 percent of British men share the same DNA as the Egyptian Pharaoh Tutankhamun, ...

Aug 03, 2011
popularity 3.6 / 5 (23) | comments 14 | with audio podcast report

Gene knockout stops immune cell development

(Medical Xpress)—Researchers at the Wellcome Trust Sanger Institute have identified the key gene in ensuring that our immune defences develop infection-fighting cells. No cells of the adaptive immune system ...

Dec 11, 2012
popularity 5 / 5 (3) | comments 0 | with audio podcast

Python venom traces could waste antivenom

A University of Queensland researcher has found the potential for Australian doctors to prescribe expensive antivenom to snake bite victims who don't need it.

Apr 16, 2013
popularity 5 / 5 (1) | comments 0

Common descent

A group of organisms is said to have common descent if they have a common ancestor. In modern biology, it is generally accepted that all living organisms on Earth are descended from a common ancestor or ancestral gene pool.

A theory of universal common descent via an evolutionary process was proposed by Charles Darwin in his book On the Origin of Species (1859), and later in The Descent of Man (1871). This theory is now generally accepted by biologists, and the last universal common ancestor (LUCA or LUA), that is, the most recent common ancestor of all currently living organisms, is believed to have appeared about 3.9 billion years ago. The theory of a common ancestor between all organisms is one of the principles of evolution, although for single cell organisms and viruses, single phylogeny is disputed (see: origin of life).

In his book The Ancestor's Tale, Richard Dawkins uses the word concestor as a substitute for "common ancestor." This new word is very gradually entering scientific parlance.

This text uses material from Wikipedia licensed under CC BY-SA