A Mutation occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene. A Mutagen is an agent of substance that can bring about a permanent alteration to the physical composition of a DNA gene such that the genetic message is changed.
1 Objective can be defined as not being influenced by personal feelings or opinions. 2  Subjective can be defined as based on personal opinion.  A statement that is completely unbiased is objective whereas a statement that is characterized by the thoughts and the views of the speaker is subjective.
subjectively - in a subjective way; you cannot look at these facts subjectively objectively - with objectivity; we must look at the facts objectively Translations