反应规范（reaction norm）：同一种GT个体在不同环境下的表现程度。

在一系列环境条件下，由于发育可塑性，同一个基因型所表达出一系列连续的表型，这一系列连续的表型叫做反应规范。

When developmental plasticity manifests itself as a continuous spectrum of phenotypes expressed by a single genotype across a range of environmental conditions, this spectrum is called the norm of reaction.

"Reaction norm" refers to the set of phenotypes that can produced by an individual genotype that is exposed to a range of different enviromental conditions (Schlichting & Pigliucci 1998; Falk 2001)