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Image of the Day: Single Origin

Despite being made of different materials, zebrafishes’ and land animals’ scales form in a similar process.

Aug 10, 2018
Sukanya Charuchandra
The different stages of scale formation (magenta) in zebrafish 
A.J. AMAN ET AL. (2018)

The scales of fish are made of bones, unlike the keratin-based scales of terrestrial animals. Despite these differences, the same genes direct the development of fishes’ bony scales and those of land animals, researchers reported in a paper published July 17 in eLife

A.J. Aman et al., “Wnt/β-catenin regulates an ancient signaling network during zebrafish scale development,” eLife, doi:10.7554/eLife.37001, 2018.

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