Are Twins Siblings?

Fraternal twins are, essentially, two ordinary siblings who happen to develop in the womb together and who are born at the same time, since they arise from two separate eggs fertilized by two separate sperm, just like ordinary siblings. This is the most common type of twin.

Are twins considered siblings?

Since identical twins share the same DNA, and both parents are identical twins, genetically, the kids are siblings even though they are actually cousins.

What is the difference between twins and siblings?

Fraternal twins are really just siblings who share the same womb. Each starts out as a separate egg fertilized by a separate sperm. They don't share any more DNA than do any two siblings. Siblings normally have 50% of their DNA the same.