Shaping of a morphogenetic gene network [Developmental Biology]

Shaping of a morphogenetic gene network [Developmental Biology]: The Abdominal-B selector protein induces organogenesis of the posterior spiracles by coordinating an organ-specific gene network. The complexity of this network begs the questions of how it originated and what selective pressures drove its formation. Given that the network likely formed in a piecemeal fashion, with elements recruited sequentially, we...