Autism Spectrum Disorders Are Neurodevelopmental Disorders That Appear to Be

Multiple Choice

Autism spectrum disorders are neurodevelopmental disorders that appear to be ________.

A) caused by a single dominant gene
B) multifactorial and complex in nature with a genetic component
C) caused by several genes located on the X chromosome
D) caused by a low number of recessive genes located mainly on the autosomes
E) directly related to trinucleotide repeat increases but not decreases