Case Three represent the information on a DNA strand that has new information inserted into it as reproduction takes place. Delete or insert one change in your instructions. Share you instructions with someone else to see what bizarre results you might have. What's Happening Mutations or changes in DNA occur all the time. Most mutations in living things are not obvious.
Some mutations benefit the generations that follow.
If a mutation is serious or harmful, it usually results in the death of the living thing. Things that cause mutations are called mutagens. Biotechnology School Enrichment for Grades 5-6.