A genetic change that caused a certain Hox gene to be expressed along the tip of a vertebrate limb bud instead of farther back helped make possible the evolution of the tetrapod limb. This type of change is illustrative of ________.

Question

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The genetic change that caused a Hox gene to be expressed in a different location in the developing limb bud altered the spatial organization of body parts, which is a type of change in a developmental gene or its regulation. This change is one example of how evolutionary changes can occur through changes in developmental processes.

A Genetic Change That Caused a Certain Hox Gene to Be