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Seedcracker Mystery Cracked

News   Nov 23, 2018 | Original Press Release from Princeton University

 
Seedcracker Mystery Cracked

Black-bellied seedcrackers (Pyrenestes ostrinus) can have large (right) or small beaks on birds of the same size, a trait that had mystified researchers for years. Princeton biologist Bridgett vonHoldt found that the two morphs differ in a 300,000-base-pair chunk of DNA, apparently inherited as a unit, which includes a well-known growth-factor gene. Credit: Tom Smith, UCLA

 
 
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