of the disorder, or if there are genetic or environmental influences that are to blame. There have been several studies conducted trying to answer that question, and I found a few while looking through PubMed. In the article, “A multivariate twin study of autistic traits in 12 year olds: testing the fractionable autism triad hypothesis” by Robinson and her colleagues (2011), the original idea that a triad of phenotypic characteristics of autism was caused by genetic and environmental factors…
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ARTICLE REVIEW Separated Twins and the Genetics of Personality Differences: A Critique Author(s): Jay Joseph EDP 1002 : THEORIES OF PERSONALITIES Introduction 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…
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As I later found out there were different types of twins and each had a distinct process. Dizygotic twins come about two ova ovulated. Each has its own zygote. This is why they don't look exactly like each other and why it's more common to be of different genders. How this relates to my future as a potential mother is that the…
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sees twin births as an evil omen. “Nwoye had heard that twins were put in earthen pots and thrown away in the [evil forest].” (61; pt. 1, ch. 7) In other societies though, the population sees any birth as an amazing gift. Individuals can gain a deeper understanding of twinning by considering the history of twinning, by knowing if yams play a part in helping women conceive twins, and by recognizing the different types of twins. Most people consider twinning, another name for conceiving twins, a rarity…
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investigated twin studies of monozygotic and dizygotic twins. He summarized 40 concordance studies and found that when one of the twins was diagnosed with schizophrenia, monozygotic twins showed a 48% concordance rate over a 17% concordance rate in dizygotic twins. Due to the monozygotic twins sharing 100% of their DNA and dizygotic sharing only 50%, this shows that genetics are very likely to play a role in someone developing schizophrenia. However, due to concordance rates not being 100% in MZ twins, it…
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the child having it. However monozygotic twins share the same genetics and therefore would lead us to think that if one twin had it than there'd be a 100% chance of the other twin having schizophrenia but this not the case. There is only a 48% chance of the other twin being diagnosed which leads us two think that there may be other factors that effect a persons chances of developing schizophrenia. The twin studies and adoption studies try to discover these. The twin studies assumed that although…
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Children are born as blank slates, Nature/Nurture debate in developmental Psychology, theoretical and research literature The nature/nurture debate of Psychology is one as old as time, it can be traced back to early philosophers such as Aristotle who proposed the theory of ‘Tabula Rasa’ that all humans are born as blank slates and that over time we come to be who we are. The other side of this debate proposes that humans are born with some form of innate knowledge, what this knowledge might be varies…
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problems I cannot figure out even considering for a long time. The problem – solving during sleep could be a good chance to obtain a result. Chapter 7: Development In this lecture, I am surprised that the twins are distinguished by monozygotic twins and dizygotic twins. To be specific, monozygotic twins are zygote splits into two separate cells, and the two cells developed…
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between criminal behaviour and genetics can be shown in research from tin studies in which Monozygotic (identical) twins and dizygotic (non-identical) twin pairs are compared. Christiansen (1977) studied the data on 3,586 twin pairs and found concordance rates of 52% in MZs and 22% in DZs. This highlights that there is a genetic contribution to crime as the rates for MZs are as expected more similar than DZ twins on this criminal behaviour ‘trait’. In addition to this another study is Brunner 1993…
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Conception and fetal development – Chapter 12 Definitions and study questions: Conception—union of a single egg and sperm Fertilization: where does it occur? Fertilization takes place in the ampulla (outer third) of the uterine tube. Meiosis: The process by which germ cells divide and decrease their chromosomal number by half, produces gametes (eggs and sperm). Mitosis: Body cells replicate to yield two cells with the same genetic makeup as the parent cell. Mitotic division facilitates growth…
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