Does Autism come from the neanderthals?
- Anonymous1 month ago
In the 1990s there was a lot of speculation that autism is a relic of earlier human cognition. The last time I read anythig about it the change to what we now consider to be neurotypical happened to our own species sometime before we left Africa. The science available since the 90s has really advanced. I don't know if anyone is actuvely researching this now and if any of the theorizing from then still holds up.
- Gray BoldLv 71 month ago
Possibly. A structure that represents the biggest known genetic difference between humans and Neanderthals also predisposes humans to autism. The structure involves a segment of DNA on chromosome 16 that contains 28 genes. This segment is flanked by blocks of DNA whose sequences repeat over and over. Such stretches of duplicated DNA, called copy-number variants, are common in the human genome and often contain multiple copies of genes. Although most copy-number variants seem to have no adverse effect on health, some have been linked to disease.
However, when both strands of a segment of DNA are flanked by highly identical sequences, they can be susceptible to large copy-number differences, including deletion, duplication and other changes, during the process of cell division. In this case, deletion, which causes the loss of the segment’s 28 genes, results in autism.
- Nine LivesLv 71 month ago
Autism is caused by environmental pollution and vaccines who contain over hundred nerve toxins.
- Anonymous1 month ago
We do not know what causes autism. It is unlikely to be genetic, because identical twins have identical genes but often only one of them is autistic at the most, instead of both of them having autism. If autism is caused by environmental factors, then Neanderthals cannot be the cause since they have been extinct for tens of thousands of years. Autism affects all races (white, Latin American, Asian, African), and they happen to all races of children who are foreign born as well as American born. So, even if we believe that Neanderthals interbred with humans (something I seriously doubt because of a lack of irrefutable evidence in the form of mitochondrial DNA or Y chromosome), it cannot account for the fact that all races are susceptible to it, since people who claim that we interbred with Neanderthals also claim that Africans did not do it.