The hero and heroine in Gemini Rising are identical—male/female—twins, not possible in our genetic makeup. They are a scientific miracle and, at their birth, stump the medical world. Their parents whisk them to Alastair Keep, their secluded castle on an island off the coast of England.
Identical twins occur when one fertilized egg splits. Identical twins share identical DNA. Fraternal twins, formed when two different eggs are fertilized, are no closer than normal siblings, sharing only about 50% of their genes.
Though identical twins have the same genotype, or DNA, their phenotypes are not identical. The DNA is expressed in different ways. Fingerprints, for one thing, are determined by phenotype. A DNA test can’t determine the difference between identical twins, but a simple fingerprint can.