Developmental plasticity and the origin of novel forms: unveiling cryptic genetic variation via "use and disuse".

Abstract excerpt

Natural selection eliminates phenotypic variation from populations, generation after generation-an observation that haunted Darwin. So, how does new phenotypic variation arise, and is it always random with respect to fitness? Repeated behavioral responses to a novel environment-particularly those that are learned-are typically advantageous. If those behaviors yield more extreme or novel morphological variants via...

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