Ants’ size and profession controlled by chemical tags on DNA

In Florida carpenter ants (Camponotus floridanus), most workers are either big, brawny majors (right) or small, active minors (left). These closely related sisters have different jobs because of different chemical tags on their DNA, researchers report.  

Shelley Berger lab/PERELMAN SCHOOL OF MEDICINE/UNIV. OF PENNSYLVANIA

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