Quote:
Originally Posted by LadyShea
Quote:
|
Originally Posted by peacegirl
If it is true that boys get more autism than girls, we should also see more cases of boys with autism in the Amish population, especially if there is inbreeding
|
For something with a genetic component to manifest, that genetic component must be present in the gene pool. That is why inbreeding can cause high incidence various traits. If a genetic trait is prevalent in a closed population, more members will exhibit it and pass it on. If the genetic trait is absent or rare, then no or few members will exhibit it. Look at the blue skinned family in Kentucky for a great example of this isolation in action.
Quote:
|
The Fugate progeny had a genetic condition called methemoglobinemia, which was passed down through a recessive gene and blossomed through intermarriage.
|
What was said was if autism has a strong genetic component, and the Amish do not have whatever that genetic factor might be in their closed population, then there would be little to no autism. If they did happen to carry that hypothetical genetic factor, they would have a much higher rate of autism...again due to lack of genetic diversity.
Closed population studies are great when looking for isolated genetic factors. |
No Amish population has been proven to have a genetic defect whether they were closed population studies or not. Show me the proof LadyShea that genetic factors cause no autism in this population, or your theories are no more than a guess which no one here seems to pick up. Why is that? Never mind, we all know why.
