In mitosis, the important thing to remember is that the daughter cells each have the same chromosomes and DNA as the parent cell. The daughter cells from mitosis are called diploid cells. Diploid cells have two complete sets of chromosomes. Since the daughter cells have exact copies of their parent cell's DNA, no genetic diversity is created through mitosis in normal healthy cells.
In Conclusion. The core difference between narrative and expository essays is their style. While narrative paper allows the author to be creative and tell a story in a way he or she likes, expository essays follow some strict rules that one must abide.
This type of writing is generally used in textbooks or 'how to' articles and essays. As such, these essays and articles follow an organized and logical sequence. An expository style of writing is more formal and straightforward, so the casual language or slang that you would use with friends is not acceptable.