Why Twin Studies?

Twins provide a valuable source for psychological research of its unique relationship, because it separates and examines the effects of genetic and environmental, allowing researchers to be healthy. The findings of Twins are important in the detection and treatment of various diseases and psychiatric disorders

How can they do it? In a twin study, researchers can confirm the overall effect of genes during disease or trait development. It was a comparison of monozygotic twins (MZ, or identical twins) twins with twin eggy twins (DZ, or sibling) twins to evaluate the extent of genetic and environmental influences due to certain characteristics. MZ twins share the same sex and 100 percent of genes. DZ twins can be the same or opposite gender, average of 50% of gene share

If the MZ twins showed more similarity to a given trait compared to the DZ twins, this provides the evidence that the gene affects a significant trait. However if a genetic factor has the same level of MZ and DZ twin functions it may be more than one environment than it affects this function. For example, Figure 1 shows the double correlated MZ and DZ some physical and psychological characteristics. As indicated, it suggests that genes may affect the development of these functions, because of these functions, on average twice the MZ twin DZ twin, because.

In addition to traditional twin studies, children's twin studies are a particularly useful way to check genetic and environmental characteristics and barriers to their cross-generation communication. For example, in MZ, the (same) twin is genetically sharing 100% of the genes of their children, twin twins and their parents, MZ twin twin sisters. Their aunt or uncle there because of a cousin like a genetic half brother. As these cousins ​​usually live in different families, this relationship will affect the unique perspective interactions that can be allowed between genetic factors and environmental factors

The results of the twin studies may indicate that a particular trait or disease has a genetic component, but did not provide information on the location of the gene or gene. However, under the influence of genetic factors the scope of design and method twins is useful for understanding psychological, medical disorders and behavior and traits. This information can then be used to develop prevention and treatment of better ways to adapt illness or bad behavior. In fact, some of the most effective treatments for diseases (eg, early onset breast cancer) were developed, partly due to the results of twin studies.

Although home learning function can reveal whether to run with family, it can not explain the reason. In the twin studies, I studied character twins. Twin studies rely on identical (or identical twin) twins with substantially identical fact genomes, and younger brothers (or twin egg twins) have an average of twice the same set of twins. The idea is that if twins were raised in the same family, the twins are affected by similar environments for identical twins and brothers twins, this effect is almost the same. If the environmental factors are the same, you can ensure that identical twins are more similar than brothers twins That is, the only factor is their great genetic similarity

Twin studies involve analysis of differences between identical twins and sibling twins. Since the brothers twins share only 50% of the same gene, so if the personality trait has a genetic component, it must be similar to brother twins of identical twins, because of the same gene, 100 of identical twins We shared%. Adoption studies included an analysis of similarity between adoptive biological relationships. When personality traits have genetic elements, adoptive and biological parents have higher similarity than adoptive parents. Family studies, twin studies and diffusion studies do not teach researchers involved in genes. Instead, they proved to affect all genes for a particular trait