Twin Studies of Anxiety Disorders Indicate That They Have a Heritability

question 21

Multiple Choice

Twin studies of anxiety disorders indicate that they have a heritability of

• A) around 20 to 30 percent.
• B) less than 5 percent.
• C) over 50 percent.
• D) almost 100 percent.

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Definitions:

Muscle Contractions

The process where muscle fibers shorten or lengthen to produce movement or maintain the position of parts of the body.

Polarized Light

Light waves that vibrate in a single plane, which can be used by some animals for navigation.

Monarch Butterflies

Migratory insects known for their distinct orange-and-black wing patterns and remarkable mass migration behavior.

UV Light

Ultraviolet light, a type of electromagnetic radiation with a wavelength shorter than that of visible light but longer than X-rays.