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Monozygotic Twins Part 1. I. 1 Answers

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Answers for: Part I

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There are two types of twins:
• Monozygotic twins, also called “Identical twins:”
They arise from a single sperm and single egg. Then the zygote is divided into two identical zygotes that carry the same genetic material and the same physical appearance.
• Dizygotic twins: also called “Non-identical twins:”
They arise from two sperms and two separate eggs. Thus, the two zygotes will not carry the same genetic materials or the same physical appearance.

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Identical twins are completely identical since they come from the same zygote. However, identical twins may not remain 100% identical overtime due to many factors such as environmental factors.

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Studying twins can tell us a lot about the genetic influence. Studying twins tells us the difference between “concordant” and “discordant.” Concordant means that both twins have, or do not have, the same trait, while discordant means that one of the twins does have a trait that the other twin does not. Studying twins tells us about twins’ possibilities of being concordant for specific traits. Actually, studying twins brought our attentions to the point that monozygotic twins are …show more content…

However, when we compare the methylation profiles for 50 years old twins, we see that the methylation amounts in each figure of the 50 years old twins (shown in red and green) are not similar. I think that the environment can affect the DNA methylation, as twins get older. The 50-year-old twins have different life environments, for example; one twin might expose to the sunlight more than the other twin, so they do not have a similar methylation profile. While the 3 years old twin have almost similar environments, as they spend most of their times at home, so they have similar methylation

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However, he is married and has one child. Although these brothers share their differences they do share some similarities. Although they both have adoptive parents, they have the same biological mother and father. Therefore they share some of the same physical features such as hair color and eye color.

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These two systems can be directly linked to the personality map developed by Eysenck, thus adding to the vast spectrum of personality traits. Nonetheless the intertwining of the Trait Approach and the Biological has moved the research of personality in to more exciting and new directions, technical advances have allowed more in-depth research into twin studies. For instance Peter Borkenau et al (2006) experimented on 168 identical and 132 fraternal

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There is a new documentary titled “Three Identical Strangers” which tells the story of three identical triplets who were separated at birth and raised by different families. It was shown at the recent Sundance Film Festival. The three, born in 1961, were part of a controversial psychology experiment to answer the nature versus nurture debate on raising children. Robert Shafran, David Kellmann, and Eddy Gallan were monitored for the study by the Manhattan Child Development Center. It is headed by Dr. Peter Neubauer, a psychoanalyst.

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The Study of Twins by Bailey and Pillard When researchers are very interested in studying that genetics has a big factor in the appearance of certain characteristics or homosexuality, they knew that the best thing to do is to take a look and study the people who are closely and very related to each other. Michael Bailey and Richard Pillard performed a research study and they compared 56 monozygotic twins or identical twins which have exact same zygote and fertilized egg, 54 dizygotic twins or fraternal twins and 57 genetically unrelated adopted brothers. They used twins as subject to this research because of course twins have identical genomes, including the sex chromosome pair. If genetics has a big impact in the origin of homosexuality

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TS 1 - Identical twins have many more differences because of how they were raised. Take Bonnie and Brenda, Brenda was the lady and Bonnie was the tomboy. Bonnie became a man and to the nature side, Brenda should have become a man but did not. Also look at the identical twins Sam and Anais, they might have the same laugh and looks, but to the nature side they should have the same kinds of jobs. Being an actress and a fashion designer may have some of the same things in common, but not enought to say they are the same kind of careers.

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While I realize that few people have the opportunity to experience such a close bond, this “twin thing” has hindered my individual development. Even though I realize that it is hard for people to distinguish me from my identical twin, it is frustrating to be always referred to as “the twins.” People

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There are many myths about the struggle between these twins in hymns from a book, dating back to the second millennium before Christ existed. The relationship of these twins proves that there is symbolism in twins not only in Greek Mythology but also in Persian Zoroastrianism Mythology. Likewise, in Northeast America, there is also a myth about opposite twins; one was born normally and the other was from her armpit (Garry and El-Shamy 458-463). The unnatural born, “who would engender evil people” would kill “his mother and blamed it on his brother,” (Garry and El-Shamy 458-463) who would symbolize good people. These myths prove there is opposite symbolism in twins.

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It could be exciting to There are different types of twins that occur in not only to humans but to a variety of different types of mammals, they are either dizygotic or monozygotic. In the case of conjoined twins, they are monozygotic, or identical, and the highest incident is in humans (Kaufman, 2004). It occurs two weeks after fertilization or at the primitive streak stage where the twins get attached to one another. Conjoined twins have a common placenta, an amniotic as well as chorionic sac (National Library of Medicine, 2006). The attachment could happen in different parts of the body and the twins could share several organs.

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Studies show that nurture is more responsible for the way you act. Nurture dictates how you respond to others. It is true that many identical twins are a lot alike, but people don’t notice the differences between them. For example, the Jim twins were a lot alike, but I think that is just a coincidence. Anais and Sam both had the same laugh, but they also had different jobs.

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