Canadian Medical Guide > Biological Sciences > Genetic Processes > Mutagenesis > DNA Repeat Expansion Terms and Definitions




DNA Repeat Expansion

Medical Definition: An increase number of repeats of a genomic, tandemly repeated DNA sequence from one generation to the next.
Also Called: Expanded DNA Repeats
Previously Indexed: Repetitive Sequences, Nucleic Acid or specifics (1993-2003)
DNA Repeat Expansion Categories.
Canadian Medical Guide Definition Trinucleotide Repeat Expansion - An increased number of contiguous trinucleotide repeats in the DNA sequence from one generation to the next. The presence of these regions is associated with diseases such as FRAGILE X SYNDROME and MYOTONIC DYSTROPHY. Some CHROMOSOME FRAGILE SITES are composed of sequences where trinucleotide repeat expansion occurs.

DNA Repeat Expansion Medical Definitions and Terms

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