Having an Identical Rather Than Fraternal Twin with Alcohol Use

question 298

Multiple Choice

Having an identical rather than fraternal twin with alcohol use disorder puts one at an increased risk for alcohol problems. This indicates that alcohol use disorder is

• A) an inattentional blindness.
• B) a hypnagogic sensation.
• C) genetically influenced.
• D) a form of narcolepsy.

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Definitions:

Twin-Study Design

A research method that compares the behaviours and traits of monozygotic (identical) and dizygotic (fraternal) twins to understand the influence of genetics versus environment.

Monozygotic Twins

Twins derived from a single fertilization event, resulting in siblings with identical genetic material.

Dizygotic Twins

Twins resulting from the fertilization of two different eggs by two different sperm, sharing 50% of their genes, similar to ordinary siblings.

Genetic Influence

The impact of genes inherited from parents on the traits and behaviors of an individual.