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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Definitions:

Sexual Behavior

Encompasses a range of activities related to physical attraction or the expression of sexual intimacy.

Masters And Johnson

Two pioneering sex researchers who conducted extensive research into human sexual response and therapy for sexual dysfunctions.

Sexual Dysfunction

A difficulty experienced by an individual or a couple during any stage of a normal sexual activity, including physical pleasure, desire, preference, arousal, or orgasm.

Peacocking

Peacocking refers to the act of extravagant dressing or behavior undertaken by a person in order to attract attention from others, much like a peacock displays its feathers.