Fragile-X Syndrome

question 111

Multiple Choice

Fragile-X syndrome

• A) is a result of a point mutation in the reading frame of the FMR1 gene.
• B) is a result of a mutant form of the FMR1 protein.
• C) is phenotypically evident in heterozygous females.
• D) results from an increase in the number of repeated CGG triplets in the promoter region of the FMR1 gene.
• E) becomes less phenotypically evident in later generations.

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