What are fraternal twins?
user
Fraternal twins are also known as dizygotic twins.  They are usually the result of separate eggs being fertilized by two different sperm. They can be of the same or opposite sexes, although for all practical purposes, they're considered identical.
assistant
What are fraternal twins?
user
Fraternal twins are a type of “twin” which come from the same egg splitting into two, but then not fertilizing.  So they’re different “siblings”, and not a pair of twins.  They’re called “fraternal” because it’s like brothers, you know?  Sorry, maybe I’m just talking too much.
assistant
What are fraternal twins?