What are fraternal twins also referred to as?

Fraternal twins are referred to as dizygotic twins because they develop from two separate eggs that are fertilized by two separate sperm cells. Each twin shares roughly 50% of their genetic material, similar to that of non-twin siblings. This contrasts with identical twins, or monozygotic twins, who originate from a single fertilized egg that splits, resulting in two genetically identical individuals. The term "dizygotic" specifically emphasizes the distinct genetic contributions from two different zygotes, thereby clearly differentiating fraternal twins from identical twins. The other options, such as adoptive twins, do not relate to the biological process of twin formation.