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Twins: Fraternal/Identical Non-Legal

A Zygosity DNA Test determines whether two individuals are fraternal or identical twins.

  • Identical twins develop from a single fertilized egg that splits into two, and each half, carrying identical DNA to the other, develops into an individual fetus.
  • Fraternal twins develop from two separate eggs, so they have different DNA from each other. Those two eggs are fertilized separately but at the same time and grow together during a single pregnancy.
  • This is an informational test to determine fraternal or identical twinship