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Human Mutation Is Slowing Down

Human Mutation Is Slowing Down 1

Mutation Station

The rate of mutation in the human genome has slowed significantly over the past million years or so, according to new research — firming up the timeline of primate evolution.

“The times of speciation we can now calculate on the basis of the new rate fit in much better with the speciation times we would expect from the dated fossils of human ancestors that we know of,” Aarhus University researcher Mikkel Heide Schierup said in a press release.

“The reduction in the human mutation rate demonstrated in the study could also mean that we have to change the estimate for the split between Neanderthals and humans to be closer to the present,” he added.

Stable Genome

To gather data for the new paper, published in the journal Nature Ecology and Evolution on Monday, Schierup andcolleagues at Aarhus and the Copenhagen Zoo examined the sequenced genomes of human families and families of chimpanzees, gorillas, and orangutans.

They found about a third fewer mutations between generations of humans than between generations of primates. In the paper, they describe this as an “appreciable slowdown” that could alter the current understanding of human genetic history.

Conservation Situation

The researchers also believe their paper could provide new insights into how great apes will deal with a changing environment.

“All species of great apes are endangered in the wild,” Copenhagen Zoo researcher Christina Hvilsom said in the press release. “With more accurate dating of how populations have changed in relation to climate over time, we can get a picture of how species could cope with future climate change.”

READ MORE: Human Mutation Rate Has Slowed Recently []

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