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Fragile X chromosome is due to the ____________ repeats?

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Fragile X chromosome is due to the ____________ repeats?

(a) CGG

(b) CAG

(c) GGC

(d) CAA

I have been asked this question in final exam.

My question is based upon Dynamic Mutation and Anticipation in chapter Nuclear Export & Post Mendelian Genetics of Cytogenetics

1 Answer

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Best answer
Right choice is (a) CGG

To explain: The number of CGG repeats in an individual determines the fragile X chromosome disease severity. This is due to anticipation.

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