genetic mutation answers
exists and is an alternate of. Merge this question into. Split and merge into it. Answer by Milym32696. Confidence votes 217. A gene mutation is a permanent change in the DNA sequence, that makes up a gene. Mutations range in size, from a single DNA building block (DNA base), to a large segment of a chromosome.enetic mutations are not always harmful. A lot of mutations have a positive effect on the host. Some genetic mutations may help the host endure certain conditions in the envi â¦ ronment, or eat certain food, or resist a certain superbug or virus, etc etc. However, some mutations can be harmful.