29 Nov '17, 3pm

How scaly dinosaurs turned into feathery birds - new gene study offers clues

Feathers and scales are comprised of keratin, and both are part of skin growth, so scientists have surmised they might have a shared evolutionary history. But the nature of that history is still a mystery. A dinosaur unearthed in 2014 in Siberia appeared to possess feather-like filaments, some growing out of scales – leading researchers to think feather-like structures might have evolved from modified scales. So the USC-led team took genes they think might be important in the development of feathers and had them expressed in chicken and alligator embryos while feathers and scales, respectively, developed. They also identified new genes that regulate the development genes and altered the amount of their activity,

Full article: https://inhabitat.com/how-scaly-dinosaurs-turned-into-fea...

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