Mutations

(from the article `Tetley, Glen`) ...incorporated movements from the ancient Chinese exercise T`ai Chi Ch`uan. Tetley became the codirector of the company in 1969, the same year that ...
Found on http://www.britannica.com/eb/a-z/m/145

Mutations

Changes in DNA, such as “misspellings” in the gene sequence or incorrect amounts of DNA, that can prevent a gene from functioning properly.
Found on http://www.brainfacts.org/glossary
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