Preview

MZ Twins: A Genetic Case Study

Satisfactory Essays
Open Document
Open Document
144 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
MZ Twins: A Genetic Case Study
The cause of phenotypic discordance in MZ twins has traditionally been attributed to postnatal environmental factors unique to the individual siblings of the pair (Poulsen, 2007). Genetic differences between MZ twins are more readily found and expressed through DNA methylation rather than point mutations and chromosomal abnormalities. In the case for women, epigenetic variations can be explained by X-chromosomal inactivation. Differences in DNA methylation and histone acetylation explain that young MZ twins are near identical, whereas elderly MZ twins express variations on several tissues by epigenetic markings. It can be concluded that elderly twins obtain a greater variability through age in comparison to younger MZ twins. MZ twins who are
Continue Reading
View Writing Issues

You May Also Find These Documents Helpful

  • Satisfactory Essays

    Asymptomatic Twin Case Studies
    • 326 Words
    • 2 Pages

    Asymptomatic Twin Case Studies

    Colleen is a 24yo, G1 P0, who was seen for an ultrasound evaluation and FTS for twins. She overall denies any major medical disorders other than some asthma but she is currently asymptomatic not on treatment. Based on her height and weight at the start of the pregnancy, her BMI was 30. On today’s assessment, overall she has no complaints.…

    • 326 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Powerful Essays

    Michigan State Twin Registry
    • 1314 Words
    • 6 Pages

    Michigan State Twin Registry

    In psychological research there are often similarities and differences among the studies that are being conducted or have been completed. The similarities could be two or more studies looking at similar subject matter or two or more studies using similar methods in their research. With the amount of ongoing and completed psychological studies there is a very high chance of their being two or more studies that share similarities. Even though there can be similarities among psychological research studies there are also differences among psychological research studies as well. So in other words it can be very easy to find two or more studies that are both similar and different from each other. An example of two studies that share multiple similarities…

    • 1314 Words
    • 6 Pages
    Powerful Essays
    Read More
  • Good Essays

    Angelman Syndrome Essay
    • 465 Words
    • 2 Pages

    Angelman Syndrome Essay

    The chromosomal region 15q11-13 (base pairs 23,133,488-23,235,220), contains the gene UBE3A. However in brain, UBE3A is expressed differently due to epigenetic imprinting, the mechanism for which is DNA methylation. The maternal allele is expressed and the paternal imprinted. Therefore any defect in the maternal allele, caused…

    • 465 Words
    • 2 Pages
    Good Essays
    Read More
  • Good Essays

    In Autism There Are Two Type of Biological Explainations Essay Example
    • 723 Words
    • 3 Pages

    In Autism There Are Two Type of Biological Explainations Essay Example

    Evidence most commonly used to prove that genes play a big role in autism; twin case studies are always used. Fraternal dizygotic twins have 50% genetic similarity, whereas identical monozygotic twins have 100% genetic similarity. MZ twins were most likely to get autism. Riveo et al studied 40 twin pairs for autistic symptoms. 23 pairs were MZ - identical and 17 were DZ – non-identical. He then concluded his results to find that 22 out of the 23 MZ twins had a 96% concordance and the DZ had a 23% concordance. This provides strong proof for genetics, as it shows that it plays a big role in autism.…

    • 723 Words
    • 3 Pages
    Good Essays
    Read More
  • Good Essays

    Assignment 1: Genetic Information Research
    • 792 Words
    • 4 Pages

    Assignment 1: Genetic Information Research

    Genetic information is complex and overwhelming and there are many resources available via the internet containing detailed facts on the subject. For this assignment, I will summarize information that is available from various genetic websites and who might find these types of sites useful. I will also select two abnormalities of sex chromosomes and two gene-linked abnormalities from Chapter 2 of our text entitled Child Development (Santrock, 2014) and use the information from the websites to provide a brief report on each abnormality.…

    • 792 Words
    • 4 Pages
    Good Essays
    Read More
  • Good Essays

    Biological Approach To Addiction
    • 710 Words
    • 3 Pages

    Biological Approach To Addiction

    * Kender et al, 1998 – 1934 female twins. Drug addiction was mainly due to genetic factor.…

    • 710 Words
    • 3 Pages
    Good Essays
    Read More
  • Better Essays

    Describe and evaluate one or more biological explanations of schizophrenia
    • 1813 Words
    • 8 Pages

    Describe and evaluate one or more biological explanations of schizophrenia

    MZ twins share 100% of their genes; DZ twins share 50% of their genes. If genes are a factor we would expect more identical twins to share the disorder than non-identical. Gottesman also looked at twin studies, he found that that the average concordance rate for monozygotic twins is 46% whereas is it only 14% in dizygotic twins. This was because MZ twins were more similar in their genetics. These results were also supported by a study by Cardno et al which used strict diagnostic criteria they showed concordance rate of 26.5% for MZ twins, but only 0% for DZ twins. This provides strong evidence for a genetic component.…

    • 1813 Words
    • 8 Pages
    Better Essays
    Read More
  • Good Essays

    Steffenson Birgitta, Et. Al.
    • 309 Words
    • 2 Pages

    Steffenson Birgitta, Et. Al.

    The twin pairs were then divided into three groups based on the response their parents provided surrounding the twin’s relationship with each other. If the parents identified the twin pair as being similar, the twins were placed in the monozygotic group, but if the parents identified the twin pair as being different, the twins were placed in the dizygotic…

    • 309 Words
    • 2 Pages
    Good Essays
    Read More
  • Good Essays

    Biological Approach to Depression
    • 738 Words
    • 3 Pages

    Biological Approach to Depression

    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
    Read More
  • Powerful Essays

    Chimerism (Dual Genetics) In Humans
    • 946 Words
    • 4 Pages

    Chimerism (Dual Genetics) In Humans

    You are the doctor of a 52-year- old woman, who comes to see you, very upset. Blood tests have revealed startling information about two of her three adult sons. Even though they were conceived naturally with her husband, who is definitely their father, the tests state that she is not their biological mother. How could she have given birth to someone else 's children? (New Scientist vol. 180 issue 2421 - 15 November 2003, page 34) How could something like this happen? Through a rare disorder called chimerism in which a single person has the presence of more than one set of DNA. I will be researching and reporting on the two most common types of naturally occurring forms of chimerism, tetragametic chimerism and micro-chimerism.…

    • 946 Words
    • 4 Pages
    Powerful Essays
    Read More
  • Good Essays

    Summary Of B. Guttman's 'Genetics'
    • 1421 Words
    • 6 Pages

    Summary Of B. Guttman's 'Genetics'

    Genetics: A Beginner’s Guide by, collective authors B. Guttman, A. Griffiths, D. Suzuki, and T. Cullis, is a book that also assists as a helpful guideline to bring the world of genetics into a bigger picture for an easier understanding of the field. Their book demonstrates how the science of genetics has evolved over the years and brings up to speed on the most recent research to date of the book. The authors state, “The reader we kept in mind as we wrote is a reasonably well- educated person who has probably forgotten bits of genetics he or she studied in school” (xi). Since genetics is such a major part of biology, this comprehensive book helps put genetics into a simpler light. Genetics are such a big part of everyday lives and…

    • 1421 Words
    • 6 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Twin Studies Paper
    • 362 Words
    • 2 Pages

    Twin Studies Paper

    Researchers study and compare traits of identical and fraternal twins; such as abilities, personalities and habits to determine if it is influenced by genetics or the environment. If the identical twins are more similar in that particular trait than the fraternal twins, the trait is thought to be inherited. In these twin studies, researchers are making several assumptions. A Lemery point out (2001) the first assumption is the twin studies represent the general population. However some obstetrical complications are more common in twins and should not be compared. The second assumption is that twins are raised together in the same type of environment. It is suggested that researchers compare their studies to other scientific studies to avoid certain assumptions.…

    • 362 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Nature vs. Nurture
    • 1107 Words
    • 5 Pages

    Nature vs. Nurture

    So twins do not have extrasensory perception, but then, why are they so similar? Is it because they are raised in the same environment or is it simply because they share the same genes? Twins may be mystifying to most the general population, but they are very interesting to scientists studying genetics. Today twin study is the major source of information fueling the scientific debate of nature verses nurture. Nature refers to traits genetic or inherited from parents and nurture refers to all traits…

    • 1107 Words
    • 5 Pages
    Good Essays
    Read More
  • Powerful Essays

    Prenatal Development Outline
    • 4575 Words
    • 19 Pages

    Prenatal Development Outline

    In one approach, researchers can experimentally control the genetic makeup of laboratory animals by carefully breeding them for specific traits. For instance, by observing animals with identical genetic backgrounds placed in varied environments, researchers can learn the effects of specific kinds of environmental stimulation. Although researchers must be careful when generalizing the findings of nonhuman research to a human population, findings from animal research provide important information that cannot be obtained, for ethical reasons, by using human participants. Human twins serve as another important source of information about the relative effects of genetic and environmental factors. If identical twins (those who are genetically identical) display different patterns of development, those differences have to be attributed to variations in the environment in which the twins were raised. The most useful data come from identical twins who are adopted at birth by different sets of adoptive parents and raised apart in differing environments. Studies of nontwin siblings who are raised in totally different environments also shed some light on the issue. Because they have relatively similar genetic backgrounds, siblings who show similarities as adults provide strong evidence for the importance of heredity (Gottesman, 1997; Sternberg,…

    • 4575 Words
    • 19 Pages
    Powerful Essays
    Read More
  • Satisfactory Essays

    What Are There So Many Differences In Identical Twins
    • 279 Words
    • 2 Pages

    What Are There So Many Differences In Identical Twins

    There are so many differences in identical twins. Let's start with the twins Brenda and Bonnie. These twins are both girls and grew up in the same house. When they got older Bonnie turned out to be lesbian. She wanted to be a guy so she could date women. She is now Aiden. Another example is the twins Tim and James. If this was nature one wouldn’t have a kidney problem. Both would. But obviously this is nurture. They both grew up in the same house but one lost a kidney.…

    • 279 Words
    • 2 Pages
    Satisfactory Essays
    Read More

Related Topics