A Significantly Higher Concordance Rate for a Trait in MZ

question 43

Multiple Choice

A significantly higher concordance rate for a trait in MZ twins indicates that may be important in the expression of that trait.

• A) the environment
• B) pleiotropy
• C) genetic factors
• D) the house in which the twins were raised

---

Definitions:

Phobic Behaviors

Actions or reactions that are excessively fearful or anxious about specific objects, situations, or activities, leading to avoidance behavior.

Aversive Stimuli

An unpleasant or harmful stimulus used to reduce or eliminate undesirable behaviors by associating them with negative outcomes.

Classical Conditioning

A learning process that occurs through associations between an environmental stimulus and a naturally occurring stimulus, foundational to behaviorist psychology.

Exposure Therapy

A psychological treatment that involves confronting fears directly in a controlled and safe environment to reduce the fear response.