A Genetic Change That Caused a Certain Hox Gene to Be

question 54

Multiple Choice

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 ________.

• A) the influence of environment on development
• B) paedomorphosis
• C) a change in a developmental gene or in its regulation that altered the spatial organization of body parts
• D) heterochrony

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