... twins share 10 0% of theirgenes. In the womb, the egg splits in two after it has been fertilizedby the father’s sperm. Because the split happens after conception, the genes are the same. The twins ... gavecomfort to the dying. In 19 79, she received the Nobel PeacePrize for her valuable work. 03 EcologyM: What exactly are the problems with the intertidal pools on the California coast?W: For ... same. The twins come from the same egg and the same sperm, so they have the exact same set of genes. That’swhy they look exactly the same.Fraternal twins, on the other hand, have a different...