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Several years ago, a man noticed a small mole on his wrist. Years later, the mole grew in size and the man was diagnosed as having metastatic melanoma. This was likely the result of: several mutations affecting proto-oncogenes and/or tumor suppressor genes. None of the other answer options is correct; cancers arise spontaneously, independent of mutations. a single mutation affecting one proto-oncogene in a cell. a single mutation inactivating a tumor suppressor gene.
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Several years ago, a man noticed a small mole on his wrist. Years later, the mole grew in size and t...
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