Preview

Twin Studies

Good Essays
Open Document
Open Document
481 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Twin Studies
Twin Studies
A twin is one of two children produced in the same pregnancy. Twins can either be identical (monozygotic) which means that they develop from one zygote that splits and forms two embryos, or they can be fraternal (dizygotic) which means that they develop from two separate eggs that are fertilized by two different sperms. Identical twins do have the same DNA, but they can be expressed in a different way. The environment the twins are exposed to determines the fine physical characteristics. Identical twins do not have the same fingerprint, and as they get older, more differences usually develop. The chance of having twins is 0.4% which is 1 in 250. Fraternal twins have an extremely small chance of having the same chromosome profile, they can look completely different then each other and they can be of the same sex or of the opposite sex. This review will detail information on how twin characteristics are genetically dispersed, or if it is due to the environment. This paper will review a number of articles, and various secondary sources published by professors, and psychologists in the field of twin studies. Identical twins share all of their genes, while fraternal twins share only about 50% of them. So, if a researcher compares the similarity between sets of identical twins to the similarity between sets of fraternal twins for a particular trait, then the extra resemblance between the identical twins should be due to genes rather than the environment. A major assumption is that identical and fraternal twins will experience the same morals, expectations and experiences when raised together. If identical twins turn out to be more similar to each other than fraternal twins, then their same genes are the reason. People have a tendency to treat identical twins more similarly than fraternal twins because they look alike. Identical twins will also notice their own physical similarity, and might copy each other from time to time. They will most likely be

You May Also Find These Documents Helpful

  • Good Essays

    CH 43 Review Assessment

    • 1599 Words
    • 13 Pages

    The similarity in the behavior of identical twins, even if separated at birth, is evidence that behavior is due to environmental influences.…

    • 1599 Words
    • 13 Pages
    Good Essays
  • Good Essays

    b1 revision notes

    • 1860 Words
    • 7 Pages

    Identical twins are genetically the same. They are a good example of the interaction between inheritance and the environment. For example, an identical twin who takes regular exercise will have better muscle tone than one who does not exercise. All of the differences that you see between identical twins, for example, in personality, tastes and aptitude, are due to differences in their experiences or environment.…

    • 1860 Words
    • 7 Pages
    Good Essays
  • Good Essays

    However, most first degree relatives and twins share the same or similar environments so it is difficult to separate genetic and environmental influences. Adoption studies compare people who have been raised in a different environment from their biological relatives. If they have similarities with their biological relatives this should be due to genes. There is evidence from adoption studies carried out by Tenari et all (2000). They conducted a longitudinal…

    • 745 Words
    • 3 Pages
    Good Essays
  • Powerful Essays

    A recent study of twins has concluded that there is a strong heritable component in GID.…

    • 4137 Words
    • 17 Pages
    Powerful Essays
  • Powerful Essays

    Twin studies are often used to determine how greatly genetics can contribute to a person’s character. This is because identical twins share exactly the same DNA, so the use of twins can investigate what may have been caused by genes as logically, if something is caused by genes then both the twins will exhibit…

    • 5819 Words
    • 24 Pages
    Powerful Essays
  • Powerful Essays

    This paper is going to discuss the Nature vs Nurture debate. There will be history of the debate, where it is presently and where it may go in the future. We will look at the beginning of the debate, the battle that started with Descartes and was pushed further by BF Skinner, Bandura and Piaget. We will further look at Bandura and Piaget and look at Social learning theory verses biology. Interviews with a sibling set of sisters, one adopted and one biological separated by 4 months in age will show us how being raised in the same environment will over shadow biological beginnings. The Nature vs Nurture debate will be discussed in detail comparing and contrasting the sisters likes and dislikes, social skills, talents and education. We will see where the debate stands today. This has been a century’s long debate and we will touch on current research and what studies are showing.…

    • 1684 Words
    • 7 Pages
    Powerful Essays
  • Better Essays

    Identical twins: show remarkable similarities, but only in characteristics your would expect: intelligence, temperament, gestures, posture and pace of speech.…

    • 2197 Words
    • 9 Pages
    Better Essays
  • Good Essays

    The biological approach is based on the idea that depression has a physical or organic cause. One explanation suggests that some people are simply more genetically inclined to develop depression, as Hecimovic suggested that it was caused by a mutation in the 5-HTT gene, which was responsible for coding for serotonin production, and that this mutation is inherited. Family studies, twin studies and adoption studies have all helped support the role of genetics in the development of depression. Gershon found that if a parent of a child had depression , that the child was then 2-3 times more likely to suffer from the disorder themselves. Twin studies, conducted by McGuffin found that the concordance rate of twins varied, depending if they were monozygotic or dizygotic. If depression is linked to depression, then it would be expected that MZ twins have higher concordance rates as they share 100% of the genetic information. He found that MZ twins had a concordance rate of 46%, while DZ twins had a concordance of only 20%. Lastly, twin studies done by Wegner found that children are 8 times more likely to develop depression if their biological parent also suffered than if their adoptive parent did, suggesting that depression is greater influenced by genetics rather than environmental factors.…

    • 738 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Module 11

    • 416 Words
    • 2 Pages

    Studying the effects of heredity and environment on two sets of twins, identical (monozygotic) and fraternal (dizygotic), has come in handy.…

    • 416 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Twin Experiments

    • 275 Words
    • 2 Pages

    The Twin Experiments was conducted by Josef Mengele, during World War 2 in Auschwitz. Dr. Mengle was a medical researcher who was fascinated with twins in specific. From the three thousand children that would be pulled from the masses of people upon arriving only about 200 survived. Age didn't matter, yet most were children, and if they were really young their mother would be allowed to stay with them. The twins recieved "special" treatmeant as they were allowed to keep their hair and clothes.…

    • 275 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Hormones and Heredity

    • 829 Words
    • 4 Pages

    many different types of studies to examine animal behavior. By doing this, scientists are able to…

    • 829 Words
    • 4 Pages
    Good Essays
  • Good Essays

    What Is Epigenetic?

    • 379 Words
    • 2 Pages

    Biologists have questioned how identical twins that have the same DNA can end up with different traits. For example one twin could develop bipolar disorder and the other twin is uneffected. So how does this happen when they have the same DNA? The answer is epigenetics. Histones have DNA wrapped around them to keep the DNA strands condensed, develop epigenetic marks. This affects certain parts of one of the twins DNA causing them to have different traits. Epigenetics varies depending on lifestyle and age. Epigenetic marks occur in many different parts of the body. For…

    • 379 Words
    • 2 Pages
    Good Essays
  • Better Essays

    Eating Disorders

    • 1123 Words
    • 5 Pages

    Participants and Instruments. There were 1006 participants of male and female twins from 10 to 28 years old (634 female twins, 374 males; Table 1). In order to locate these people they used an archival method. Using the Michigan State University Twin Registry (MSTUR) as well as different methods to enlist subjects like classified ads (Klump et al. 2010). Interestingly all the participant were of the same region. In order to determine the accuracy of the twins questionnaires were given to examine physical similarities and those that seemed inaccurate were reviewed by MSTUR through pictures and other correspondence.…

    • 1123 Words
    • 5 Pages
    Better Essays
  • Satisfactory Essays

    Twin Studies Essay

    • 568 Words
    • 3 Pages

    If I was a criminologist, I would focus on the development of the brain of different people, as well as twin studies, the different types of body builds and even heredity genes that run throughout family lines. I know it would take a lot of research to develop these hypothesis of what I can focus on to see what makes people commit crimes. The development of the brain can show many characteristics. Then we could look into twin studies of things and look more into people hereditary genes.…

    • 568 Words
    • 3 Pages
    Satisfactory Essays
  • Satisfactory Essays

    As twins, we have many similarities in our appearances. My sister and I both normal size, and have the same height. Furthermore, we both have brown hair, brown eyes, and same face structure. Our round faces are almost identical. We also wear the same sizes in clothes because of our same figure. Our tiny hands and chubby feet look exactly alike. Moreover, our styles of fashion are also similar, including baggy t-shirts, shorts, and flip flops. This similar appearance was a problem growing up, because we would steal each others’ clothes. But we use our same style in fashion to our advantage; we both always have each other to go shopping with. When the two of us are talking our voices come out sounding the same. People are sometimes confused on what twin is talking. If the both of us had our backs turned to you there would be no way in telling which one was who. One main thing we share together is each other friendship. I can go to my sister with anything. She is my best friend. She also feels the same about our friendship.…

    • 505 Words
    • 3 Pages
    Satisfactory Essays

Related Topics