Scientists at the University of Utah and the University of Pittsburgh think they know the genes that made us lose our fur coats.
University of Utah associate professor Nathan Clark, while at the University of Pittsburgh with Amanda Kowalczyk and Maria Chikina, compared the genes of 62 mammals, including some hairless species, like us.
"What we wanted to do is determine the genetic regions of the genome. So, genes and regulatory regions that control the formation and maintenance of hair," Clark said. "We developed a very strong ability to sweat, and hair would interfere with that cooling process," Clark said.The research team compared the genomes of haired and hairless species, looking for genes in the latter that evolved at faster rates. The idea is that those genes say, for example, a gene that determines hair color, isn't important in a hairless animal and so will mutate at faster rates without impacting survival.
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