The Science Behind The Unique Set Of Twins

If anyone wanted to dive deep into the details and learn the science behind this rare occurrence, here you go. In Lucy and Maria’s case, they are what people would call non-identical, fraternal, or dizygotic twins. According to Better Health, this happens when two separate sperms fertilize two eggs.

Well, that explains how two genetically different fetuses are formed. In this case, Donna came from a mixed family, which means that she carried the genetics for both dark and light skin. The chances of which child would get less or more melanin was not under her control.