When Dr Hernandez Compares Happiness in a Sample of Fraternal and and Identical

question 114

Multiple Choice

When Dr. Hernandez compares happiness in a sample of fraternal and identical twins, she finds fraternal twins' scores on this trait differ a great deal, while identical twins' scores are virtually "the same." Dr. Hernandez would conclude that happiness is:

• A) mainly genetic.
• B) mainly environmental.
• C) due to our upbringing.
• D) greater for identical twins than fraternal twins.

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Definitions:

Biceps Brachii

A large muscle of the upper arm responsible for flexing the elbow and rotating the forearm, well known for its two heads or points of origin.

Serratus Anterior

A muscle located on the side of the chest that assists in the upward movement of the arm and in breathing.

Lateral Flexion

The bending of the neck or body toward the right or left side.

Posterior Neck Muscles

The group of muscles located at the back of the neck, including the trapezius and the splenius muscles, responsible for movements of the head and shoulders.