Mutations can be in a virus.Logical formLearned from4 sentences. A molecular clock may be based on a rate of mutation.Logical formLearned from4 sentences. Mutations may affect a regulation of genes.Logical formLearned from4 sentences. A (tb germ) may undergo a mutation.Logical formLearned from4 sentences. (World health experts) may prepare for a mutation of a disease.Logical formLearned from4 sentences. (Bird flu chief) can be mutations.Logical formLearned from4 sentences. A strain may undergo a mutation.Logical formLearned from4 sentences. Mutations can be in sperm.Logical formLearned from4 sentences. Mutations may occur in cells.Logical formLearned from4 sentences. A problem may lie with a mutation.Logical formLearned from4 sentences. A mutation can be into a force.Logical formLearned from4 sentences. A prime mover can be in a mutation.Logical formLearned from4 sentences. A mutation may be made in a dna.Logical formLearned from4 sentences. A test can be for mutations.Logical formLearned from4 sentences. A case can be constituted-of-or-filled-with (a/h1n1 virus mutation).Logical formLearned from3 sentences.