What type of twins originate from two different eggs and sperm?

Fraternal twins, also known as dizygotic twins, arise when two separate eggs are fertilized by two different sperm. This process results in the development of two genetically unique siblings who share about 50% of their DNA, similar to any other siblings born at different times. Each twin will have its own placenta and amniotic sac.

In contrast, identical twins, or monozygotic twins, result from the splitting of a single fertilized egg into two embryos. This means that identical twins share 100% of their genetic material, which leads to them having identical physical characteristics. Monozygotic and conjoined twins also do not pertain to twins arising from separate eggs and sperm; rather, conjoined twins are a result of the incomplete division of a single zygote, leading to twins who are physically connected.

Therefore, the distinction of fraternal twins originating from the fertilization of two separate eggs makes this choice the correct answer.