THERE ARE MANY DIFFERENT GENETIC CAUSES OF ASD – SINGLE-GENE (FRAGILE X SYNDROME)
❑ Intellectual disability ❑ 20-30% are diagnosed with ASD ❑ Facial dysmorphism, epilepsy ❑ on the X chromosome – more severe in boys
❑ FMR1 regulates a large network of other genes
❑ Accounts for up to 1% of autistic individuals ❑ Inherited single gene variants account for 3-5% of ASD
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