Which abnormality is found in the abnormally fragile X-chromosome in the fragile X syndrome?
A. translocation
B. deletion
C. imprinting
D. hypermethylation
E. amplification of tandem trinucleotide repeats
E
The fragile site on the X-chromosome in the fragile X syndrome shows an expanded trinucleotide repeat. This finding provides an explanation for the clinical phenomenon known as "anticipation," whereby a hereditary disease becomes more severe with each generation.
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Fill in the blank(s) with the appropriate word(s).
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Answer the following statement true (T) or false (F)
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