Fraternal twins develop from which of the following?

Fraternal twins, also known as dizygotic twins, develop from two separate eggs that are each fertilized by their own sperm. This occurs when a woman releases more than one egg during a menstrual cycle, and each egg is fertilized by a different sperm. As a result, fraternal twins share about 50% of their genetic material, similar to regular siblings, because they come from different zygotes.

In contrast, a single fertilized egg would lead to identical twins, as would the scenario of two sperm fertilizing one egg, which is not a viable option since only one sperm can fertilize an egg. Therefore, the correct understanding of fraternal twin development is that it specifically involves two distinct fertilization events, leading to the conclusion that two different eggs are involved, each undergoing the fertilization process with separate sperm.