According to Bloomberg's report, a common variant of a gene called CACNAIG my be responsible for four times higher frequency of autism among boys than girls. Stanley Nelson, a professor at UCLA, mentioned that the gene is not likely a risk factor for autism.
Researches analyzed the DNA of 1,046 members of families with at least two sons diagnosed with autism. Inside chromosome 17, a hot spot of previous autism studies, these families harbored a variant of CACNAIG gene.
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