Evidence suggests that autism spectrum disorder (ASD)
A) has no genetic basis.
B) is caused by a single dominant gene.
C) is caused by a single recessive gene.
D) is caused by two abnormal genes.
E) is caused by the interactions of many genes, with each other and the environment.

Question

Quizplus · Accepted Answer

There is strong evidence suggesting that autism spectrum disorder (ASD) is caused by the interactions of many genes with each other and the environment. Studies of identical twins have also shown that there is a high concordance rate, meaning that if one twin has ASD, the other is more likely to have it as well, but not 100% of the time. This suggests that genetic factors are involved, but not solely responsible. In addition, environmental factors, such as exposure to certain toxins or infections during pregnancy or early childhood, are also believed to play a role.

Evidence Suggests That Autism Spectrum Disorder (ASD)