Genes inherited from our ancestors crossbreeding with an extinct species of humans may have left a significant and lasting impact on our mental health, according to researchers.appear to have inherited a genetic adaptation involved in zinc regulation that may have helped them weather the colder climates of the day — but at the same time may have been responsible for predisposing us to depression and all kinds of mental disorders.
During the researchers' genomic analysis, they found that a genetic adaptation in modern human populations was remarkably similar to part of the genome of the Denisovans, strongly suggesting that it came from our ancestors interbreeding with them. Because this adaptation does not appear in Neanderthals, the researchers have ruled them out as its source.
The fact that the zinc mutation survived suggests it must have provided some sort of advantage. Lab experiments conducted by the researchers attempted to prove what it was.
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