Using a new tool, scientists have taken another step towards solving one of the mysteries of “modern man”, which could lead to a more accurate comparison between the DNA of modern man and our extinct ancestors.
According to a study published in the journal Science Advances, only 7% of our genomes are unique to other humans. Is common And it is not seen in our early ancestors.
Scientists performed the study using DNA extracted from the fossil record of extinct Neanderthals and Denisovans dating back 40,000 to 50,000 years, and compared it with 279 modern humans from around the world. They already knew that some of the DNA of modern humans shared with Neanderthals, but humans share different parts of the genome. Therefore, one of the goals of this new study is to identify the unique genes of modern humans.
“John Hawks, a paleontologist at the University of Wisconsin-Madison who was not involved in the study, said: ‘
“This is a very difficult statistical problem, and researchers have developed valuable tools that also examine data lost in ancient genomes.”
The researchers also found that even a small portion of our genome (1.5 percent) is specific to our species and is common to all living things today. This type of DNA may contain the most important clues about the “distinguishing feature of modern humans.”
In 2010, Richard Green, a computational biologist at the University of California, Santa Cruz, and one of the researchers, co-authored an article entitled “A Sequence of the Neanderthal Genome Sequence,” and four years later, a geneticist named ” Joshua Aki wrote an article showing that modern humans carry some Neanderthal DNA remnants. Since then, scientists have continued to analyze the genetic material of fossils and refine extraction methods.
“These findings emphasize that we are in fact a very young species, and we have just divided the earth with other human races,” Aki said of modern humans.