A Genetic Change That Caused a Certain Hox Gene to Be

question 10

Multiple Choice

A genetic change that caused a certain Hox gene to be expressed along the tip of a vertebrate limb bud instead of further 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 organisation of body parts.
• D) heterochrony.

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Definitions:

Overconfidence

The tendency to overestimate the accuracy of one’s knowledge and judgments.

Hindsight Bias

The habit of assuming, once an outcome is known, that it was predictable beforehand.

Emotional Instability

A characteristic of individuals who experience rapid, intense emotional changes often in response to events that would not typically provoke such strong reactions.

Naturalistic Observation

involves studying subjects in their natural environment without any manipulation by the researcher, to understand behavior in a real-world setting.