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Altered bioelectric genes give zebrafish wings like flying fish

By Claire Ainsworth

16 March 2021

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Flying fish fins spread like wings, letting them soar for hundreds of metres

Anthony Pierce/Alamy

Flying fish may have taken to the air when evolution tweaked electrical signals that control the size of their fins. This discovery suggests the existence of a previously unknown mechanism by which animals can change the relative size of specific body parts.

“How organs and tissues know when to stop growing at a certain size and stay there is a major mystery,” says Jake Daane at Northeastern University in Massachusetts. This scaling, known as allometry, is also a …

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