A Genetic Change That Caused a Certain Hox Gene to Be

question 31

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 its regulation that altered the spatial organization of body parts
• D) heterochrony

---

Definitions:

Overgeneralization

A logical fallacy involving making broad generalizations from too little evidence or specific cases.

Bloodletting

An historical medical treatment involving the withdrawal of blood from a patient to cure or prevent illnesses, now mostly obsolete due to its ineffectiveness and risk.

Medieval Times

A historical period in Europe lasting from the 5th to the late 15th century, characterized by feudalism, castles, and knights.

Herbs

Plants with savory or aromatic properties that are used for flavoring food, medicinal purposes, or fragrances.