Fragile X syndrome is caused by too _______ trinucleotide repeats, which results in a(n) _______ in the number of synapses in the brain.

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Fragile X syndrome is caused by too many trinucleotide repeats, specifically CGG repeats in the FMR1 gene. This leads to a decrease in the number of synapses in the brain, which is believed to contribute to the cognitive impairments and developmental delays associated with the disorder.

Fragile X Syndrome Is Caused by Too _______ Trinucleotide Repeats