Which of the Following Can Be Attributed to the Presence

Question

Which of the following can be attributed to the presence of unstable trinucleotide repeats?
A) Huntington's disease
B) Fragile X syndrome
C) Mytonic Dystrophy
D) Huntington's Disease and Fragile X Syndrome
E) All of these

Accepted Answer

Both Huntington's Disease and Fragile X Syndrome can be attributed to the presence of unstable trinucleotide repeats. Mytonic Dystrophy is also caused by trinucleotide repeats, but it is a different type (CTG repeats), whereas Huntington's and Fragile X both involve CAG repeats.