What it Would be Like to Have a Twin

What is the feeling of having twins? This is a question that people can think carefully. People often say they are looking at people like the people they already know. "Twin" comes from "twine" in German. Most people automatically think about two people who are very similar when hearing the word "twins". However, the number of twins is large, not similar. Twins are the most common kind of multiple birth. Many people think that there are only two kinds of twins, the same twin and brothers.

Twin studies: Identical twins provide a natural experiment that two members of a twin are identical on average to all genes. In contrast, brothers twins are genetically not twin brothers. Because they have only half genes. Both twins have the same environmental impact (although it is larger than expected by non-twin brothers). Since the same twin and sibling twin differ only in the amount of DNA they share, the similarity of certain traits of the same twin is higher than that of siblings twins and indicates the genetic contribution of this trait It is. If the same twin twins are similar for a particular property, this is the proof that the shared environment contributes to that property. Being able to separate genetic and shared environmental influences using twins is a powerful advantage of using twins. Another advantage is that both members of the twin are of the same age.

Twins, also known as siblings twins, are also important. Like other brothers, they share 50% of the same gene, but since they are the same age, they can be taken from the equation, so studying them is better than studying brothers It is. However, some of the most powerful twin studies are actually studying the same twins and different twins under the same conditions. If monozygotic twins and monozygotic twins are likely to have a particular property or disorder, this characteristic is slightly less likely to be genetically affected.

Studies using twin studies looked for degrees of identity (or similarity) between identical twin and sibling (ie not identical) twins. If two or both of the twins are characteristic, the twins are consistent with the feature. If one appears, the twin is considered to be one of the contradictory traits, and the other is not. The genetic makeup of the same twin is the same, only 50% of sibling twins coexist. Thus, if the coincidence rate of the same twins (range 0 to 100) is considerably higher than the sibling's twin coincidence rate, this demonstrates that genetics plays an important role in the development of specific behavior .