Twin Cancer Studies

Conjoined twins are a rare phenomenon. In the even that a set should appear where one twin is dependant upon the other, I believe that they should be separated, at minimum, to save the life of one. At the same time, I believe that every set of conjoined twins is its own special case. In this study, I will present the background information on conjoined twinning, give a few case studies, and give the pros and cons of conjoined twin separation. I will end with my own views on the subject.

The idea that they came up with was finding identical or fraternal twins in order to draw a comparison between the behaviors that they share. The most common similarities between the twins (after multiple meetings with pairs of twins) can be concluded as genetic, and other factors could be considered due to the environment, like learning a language. In 1983, Bouchard and Lykken brought together these twins who participated in the study. First, they needed to gather identical twins who were separated at birth. The researcher 's’ goal was to gain as much information as possible on these twins within one week. They had fifty hours of studies on many levels. These studies included personality trait scales, aptitude, IQ tests and occupational interest tests.

The CDC estimates that each year, more than eight million people are diagnosed, and consequently died from cancer, and this statistic was even higher in the 1950s. During this period, little was known of cancer’s effects on the

Parallel to this, the focus on genetics is Particularly convicted in twin studies, which establish a comparison between monozygotic twins that are identical and dizygotic twins, which are opposingly non-identical. This distinction can be identified in Torgersens study, which compared MZ and same sex DZ twins where one proband had an anxiety disorder, and it was discovered that such disorders were 5x more frequent in MZ twin pairs, who mutually shared identical genetics.

Active smoking and disease relationship was first studied as case-control studies in Germany during 1939 and 1943which revealed a strong association between active smoking and lung cancer [1]. After that large number of studies were conducted which established relationship of tobacco smoke with

Twin studies are a mainstay of the nature verse nurture debate because they allow researchers to conduct “natural experiments” on human beings. When researchers try to determine the relative importance of genetics and environment with regard to a certain condition, they have a hard time because they cannot generally get people with the same genes. This is where twin studies come in. Twins studies are part of the method used in behaviour genetics, which includes all data that are genetically informative. E.g. siblings, adoptees, pedigree data etc. Researchers use this method to estimate the heritability of traits and to quantify the effect of a person 's shared environment (family) and unique environment (the individual events that shape a life) on a trait.

The Minnesota Twin Registry started in 1983 and its goal was to establish a registry of all twins born in Minnesota from 1936 to 1955 to be used for psychological research.., T.J. Bouchard, working in conjunction with the University of Minnesota, started exploring the similarities and differences in characteristics like personality, career interests, and a variety of personal interests between identical twins who were reared apart. Research was conducted on twins from all over the world. The Minnesota Twin study gave scientists a new insight of the role of nature vs. nurture on human development and personality; it was the hope that twin studies would be able to tie genes to specific behaviors. From the study, we understand that twins who were separated at birth and raised in different families

Twins, share a bond that no parent, child or sibling relationship can ever compare. There are two main types of twins, and these include: monozygotic (identical) twins and dizygotic (fraternal) twins, and they are compared by their emotional, behavioural, and cognitive similarities. (Robert Plomin, 1997). According to Social Issues Referencing, 2007, whereas Identical twins are formed from a single (mono) zygote and are genetic “carbon copies”, fraternal twins develop from two (di) separate zygotes, as a result of two eggs being fertilized by two sperms independently. (Social Issues Referencing, 2007, para. 8)

Methods: The researchers needed a way to study a person who developed in a certain environment and how similar or different that person would be having been raised in a different environment. They came up with an experiment using monozygotic (identical) twins. Half of the pairs of twins were reared together (MZT); the other half were reared apart (MZA) and separated early in life. Each twin was individually given numerous surveys and

As Joseph (2004) pointed out, however, this is not always the case. Monozygotic twins are more likely to be treated in a similar way, encounter more similar environments, and be to be thought of as ‘the twins’ rather than two separate individuals. This, in turn, can lead to ‘identity confusion’ and so potentially a higher concordance rate amongst monozygotic twins. Therefore Joseph argues that the greater concordance rate seen in monozygotic twins than in dizygotic twins is a result of the differing attitudes and environments experienced by the two types of twins.

Twin studies have been a large part of the growing debate on whether genetics or environment (nature v. nature) is responsible for the cognitive, socio-cultural and biological development. In order to properly assess twin studies it is important to know why and how they are relevant in psychology. Identical twins are especially effective in research particularly in the field of developmental psychology and behavioral genetics due to the monozygotic genes which means they originate from a single zygote (fertilized egg) which essentially means they share 100% of the same genes. Due to this exact copy of genes between twins means this can be efficiently be used in order to observe the impact of

I study was preformed by Janicak et al 2001; they found that monozygotic twins have a 48% concordance rate. This is considerably less in dizygotic twins where the concordance rate falls to 17%. This would suggest there is a strong case for genetics being involved with

Another study strategy to demonstrate the genetic component of a disease, and help to discriminate it from the environmental component is the twin study, which compares the correlation to the disease between monozygotic (MZ), with concordance among dizygotic twins (DZ). This type of epidemiological study 7parte the assumption that twins MZ and DZ suffer similar environmental influence, however, the MZ are genetically identical while the DZ not necessarily presenting genetic identity as similar as two brothers generated at different

Throughout history, across all cultures, people have been fascinated with twins. In addition to interest in the close emotional ties and biological similarities that twins may share, reports of special twin languages and twin extrasensory perception (ESP) help people to explore ideas of what it means to be human. How similar or different are they to each other? How important are genes and environment for development? Because identical twins share all of their genes, it is the environment—rather than genetics—that accounts for any differences between them.

Lung cancer takes the lives of many at a young age and the cause isn’t always clear as of how this disease was contracted. The most popular idea of what causes lung cancer since early times has been using tobacco. Tobacco contains nicotine which is a highly addictive drug that gives a temporary feeling of relaxation. When people get addicted to nicotine, it becomes incredibly difficult for the victims to stop smoking. According to Brody, Lung cancer has been shown to take the lives of more people compared to any other form of cancer and this is the case since lung cancer is associated with life style. New information regarding lung cancer has shown that about one-fourth of those victims who are diagnosed didn’t obtain it through first hand smoking. People can obtain this illness through an “unlucky” combination of genetics (Brody).