A general stereotype about identical twins is that they are clones. They act alike, look alike, and are expected to be "identical." However, the term identical twins actually refers to a type of twinning, and describes how they form, not what they look like.
The correct term for identical twinning is monozygotic. Monozygotic twins form from a single (mono) fertilized egg (zygote). The zygote splits into two parts after conception, resulting in the development of two individual embryos. Because the two embryos are the result of a single egg/sperm combination, they have the same genetic origins. They have the same DNA.
