one nucleotide is preplacced with a different nucleotide
addition
substitution(point)
deletion
inversion
when one or more nucleotides are inserted
addition
deletion
insertion
remake
When a nitrogen base (nucleotide) is removed from a gene, this is called a ________ mutation.
removal
deletion
substitution
insertion
Genetic mutations can be...
beneficial, harmful, or neutral
beneficial only
harmful only
neutral only
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