Hermaphroditism is the presence of both male and female sexual organs. This is common in many invertebrates, fish, and most species of flowers. However, it is a rarity to find this condition in humans and other species outside snails, flowers, fish, and so on. This condition can be caused by two sperm cells fertilizing the same egg, while carrying different chromosomes. Thus, a hermaphrodite is born. However, this condition is often 'treated' early on in life with gene therapy, and other treatments, such as genital surgery.