Whats the difference between identical and fraternal twins

Twin type has less to do with what twins look like and more to do with how they formed.
Identical, or monozygotic, twins form when a single fertilized egg splits and develop as two babies in the uterus. Identical twins originate from the same combination of cells and have the same genetic origin. They are ALWAYS the same sex, two girls/two boys. They may look very similar and it may be difficult to tell them apart.
Fraternal, or dizygotic, twins are two individuals from the same pregnancy who from TWO SEPARATE eggs fertilized by TWO SEPARATE SPERM. The genetic similarity between fraternal twins is the same as any two siblings, about 50 percent. They can be boys, girls, or one of each.

A representative government is a type of government in which the citizens vote to elect people that would represent them. This means that the elected people will listen to their concerns and act in accordance to them. This is the type of government that was established in the colonies after Independence. Therefore, the sentence could be something like this:

"Because the colonists did not feel that their interests were represented in the English government, they decided to establish their own representative government."