Which of the Following Mechanisms in Fragile X Syndrome (FXS)

question 12

Multiple Choice

Which of the following mechanisms in fragile X syndrome (FXS) leads to expression of the disorder?

• A)Trinucleotide repeat sequences interspersed with the exons of the FMR1 gene, resulting in the production of an abnormal protein
• B)Trinucleotide repeat sequences causing methylation of the FMR1 gene, thus silencing its expression
• C)Increased production of microRNA molecules that interfere with the transcription of the FMR1 gene
• D)Increased production of microRNA molecules that interfere with the translation of the FMR1 gene

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Definitions:

Heterosexuals

Individuals who are romantically or sexually attracted to people of the opposite sex.

Homosexuals

Individuals who are romantically or sexually attracted to people of their own sex.

Sexual Orientation

An inherent or immutable enduring emotional, romantic, or sexual attraction to other people, based on their gender or sex.

Environmental Factors

External elements that can influence an individual's behavior, development, and life outcomes, including natural, social, and built environments.