A genetic screen can be for mutations.Logical formLearned from17 sentences. A class can be constituted-of-or-filled-with mutations.Logical formLearned from17 sentences. A frequency may pertain-to a mutation.Logical formLearned from17 sentences. Mutations can be selected.Logical formLearned from17 sentences. A mutation can be unexpected.Logical formLearned from17 sentences. Mutations may undergo an acquisition.Logical formLearned from17 sentences. A virus may undergo a (mutation rate).Logical formLearned from17 sentences. An avian-flu virus may undergo a mutation.Logical formLearned from17 sentences. Testing can be for mutations.Logical formLearned from16 sentences. A mutation can be advantageous.Logical formLearned from16 sentences. Mutations can be accumulated.Logical formLearned from16 sentences. A disorder may be caused by mutations.Logical formLearned from16 sentences. A mutation can be a change.Logical formLearned from16 sentences. A mutation can be sporadic.Logical formLearned from16 sentences. A (mutation assay) can be forward.Logical formLearned from16 sentences.