A sudden change in the molecular structure of a gene,called a(n)________,may occur spontaneously or may be caused by an environmental event such as radiation.

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A mutation is a sudden change in the molecular structure of a gene, which can happen spontaneously or due to an environmental event like radiation. Deviation and alteration do not specifically refer to changes in genetic material, while devastation is not a scientific term that would be used in this context.

A Sudden Change in the Molecular Structure of a Gene,called