Looking at the Concordance Rates for Autism Found in Twin

question 63

Multiple Choice

Looking at the concordance rates for autism found in twin studies and family studies, Newschaffer and colleagues (2007) believe that autism is primarily the result of ____.

• A) genetic factors
• B) genetic and environmental factors
• C) environmental factors
• D) sociocultural factors

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Definitions:

Draw Blood

The process of puncturing a vein to obtain a sample of blood for analysis or donation.

Radial Vein

A vein located in the forearm that runs alongside the radius bone, draining blood from the hand back toward the heart.

Hemiazygos Vein

A vein on the left side of the vertebral column that drains blood from the posterior walls of the thorax and abdomen into the superior vena cava.

Brachiocephalic Vein

A large vein formed by the union of the internal jugular and subclavian veins, draining blood from the head, neck, upper limbs, and upper chest.