College Essay On Identical Twins

There are many different types of twins in the world and they all function a little bit differently. Many cases of twins being separated at birth give us an inside look on the way nurture and nature affect twins as well.
Twins appear one time in every thirty deliveries in the United States. More specifically, three in every one thousand for identical twins and over twenty in every one thousand for fraternal twins. Another type of twins is mirror twins, they appear point three percent of all births in the United States. Identical twins are considered “monozygotic”, meaning they come from one fertilized egg split in two. Because of this, they have a very similar genetic code, which gives them their similarities. They are also contained in one amniotic sac. Most people believe identical twins are “identical”, but that is not true. Identical twins are considered only nearly identical. Though they are not entirely identical, the twins are always the same gender and so is their blood type. Identical twins have a high risk for Twin-to-Twin Transfusion Syndrome (TTTS), or a disease of the placenta that affects twin pregnancies. This causes the donor twin to have decreased blood volume. Another condition they might acquire is schizophrenia, which inflicts fifty percent of identical twins. This type of twin also has “Copy Number Variants”, or …show more content…
If one twin is right-handed then the other twin is left-handed. Other examples of this include birthmarks, eye shape, eyebrow shape, teeth, ear shape, moles, dimples, cowlicks, hair whorls, nostril shape, and freckles. In some rare cases, though, even their organs will be on opposite sides. Mirror twins are one of the rarest types of twins as they only show up point three percent of all births. Mirror twins come from one egg meaning they are also identical, but the egg splits nine to twelve days after the egg is conceived. Therefore, if the egg splits any later the twins will be