Other times, a family may see the minor differences in identical twins and declare the twins fraternal based on these differences in appearance. There are a few commercial laboratories that, for a fee, will send families DNA collection kits to determine if the twins are identical or fraternal. read more
Fraternal twins are more common than identical twins. Triplets and other higher-order multiples can result from three or more eggs being fertilized, one egg splitting twice (or more), or a combination of both. A set of higher-order multiples may contain all fraternal siblings or a combination of identical and fraternal siblings. read more
Fraternal Twins versus Identical Twins comparison chart; Fraternal Twins Identical Twins; Develop from: Two different eggs fertilized by two different sperm cells: The splitting of the same fertilized egg into two: Genetic code: Like any other sibling; not identical. Nearly identical: Gender: Usually different: Always the same: Likelihood: Varies by country. read more