The rise in autism rates cannot be a result of genetics. These children have been poisoned.
Genetic mutations sometimes occur over the course of one generation, but more often, the process of genetic variation occurs over multiple generations; for humans, this would be thousands of years. The most dramatic rise in autism has been in the past 30-35 years.
Since our genome has been driven by reproduction over multiple generations (which works in a way that favors the higher order), the elimination of faulty genes that produce mutations that are not advantageous to the organism is one of the highest goals of the organism. Faulty genes are a major reason for miscarriage, the fetus is not viable and the body will terminate the pregnancy. Many people want to believe that autism is genetic, but the rate at which autism has risen over the last 30 years can not, and never will be explained by genetics. They were not born that way. They have been brain damaged. Parents of autistic children report that the child was healthy, developing normally and regressed after some environmental exposure; most often vaccination, or pesticides such as glyphosate.