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CIGNA - XYY Syndrome XYY syndrome is a rare chromosomal disorder that affects males. XYY syndrome is a rare genetic disorder caused by the presence of an extra Y chromosome. XYY syndrome is a rare chromosomal disorder present at birth that affects only males. www.cigna.com /healthinfo/nord812.html   (1943 words)

XYY Syndrome / Jacob's Syndrome for Lesson Plans & Science Fair Projects XYY syndrome is a aneuploidy of the sex chromosomes in which a human male receives an extra Y chromosome in each cell, hence having a karyotype of 47,XYY. XYY boys have an increased risk of minor speech and motor skill delays and learning disabilities with roughly half requiring some special education intervention. XYY syndrome is not inherited, but usually occurs as a random event during the formation of sperm cells. www.juliantrubin.com /encyclopedia/biotechnology/xyysyndrome.html   (571 words)

XYY XYY is a trisomy in which the male receives an extra "Y" chromosome. Other than being slightly taller and having more severe acne than normal, XYY males are not significantly different from "normal" males. An old study suggested that there were more XYY males incarcerated[?] than expected, but this study has been widely countered as being procedurally flawed. www.ebroadcast.com.au /lookup/encyclopedia/xy/XYY.html   (71 words)

Spartanburg SC | GoUpstate.com | Spartanburg Herald-Journal XYY syndrome is an aneuploidy (specifically a trisomy) of the sex chromosomes in which a human male receives an extra Y chromosome, producing a 47,XYY karyotype. A popular misconception in the 1960s and 1970s that XYY males were more prone to criminal behavior led to several novels and TV series which exploited the idea with little regard to the science. Less sympathetically, Kenneth Royce's series of novels about The XYY Man partially played up to the stereotype, with an anti-hero figure William 'Spider' Scott, whose extra Y chromosome is seen in part to be responsible for his career as a highly skilled (though non-violent) cat-burglar. www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=XYY_syndrome   (1084 words)

"The XYY Man" (1976)   (Site not responding. Last check: ) XYY syndrome is a rare mutation, in which a male child is born with an extra Y chromosome... In adulthood, XYY men tend to be very tall and thin with severe acne problems. Some studies allege that XYY men tend to be of sub-normal intelligence with a penchant for criminal behaviour, but other studies contradict this. www.imdb.com /title/tt0075601   (464 words)

XYY Males - an orientation Boys with XYY are often more physically active than their brothers, and if this activity is well accepted and canalised out in play, sport and other physical activities together with the parents and together with other children, this condition is in no way negative. In a study of 60 XYY boys found among consecutively new-born children in USA, Canada, Scotland and Denmark intelligence was found to be normal with an average 10 of 105, both for the XYY boys and for the control group. Nor was there any difference between the XYY males and a control group with regard to the number of children, and the children of the XYY males were as healthy as those in the control group. www.aaa.dk /TURNER/ENGELSK/XYY.HTM   (2525 words)

XYY syndrome Symptoms - Medical Symptoms Pages XYY syndrome, or jacob's syndrome, is a trisomy of the sex chromosomes in which a human male receives an extra Y chromosome in each cell, hence having a karyotype of 47,XYY. There are reports that men with XYY syndrome may be more likely to have behavior problems, possibly due to a higher testosterone level, but these are usually avoided if the syndrome is detected early. XYY syndrome is not inherited, but usually occurs as a random event during the formation of sperm cells. www.symptoms101.com /med/archives/2005/05/xyy_syndrome.php   (346 words)

XYY syndrome Summary XYY syndrome is a chromosome disorder that affects males. The XYY syndrome was previously considered the "supermale" syndrome where men with this condition were thought to be overly aggressive and more... The XYY karyotype was first described in a 1965 study of 197 males in a Scottish maximum-security prison. www.bookrags.com /XYY_syndrome   (208 words)

XYY Syndrome XYY syndrome is a rare genetic disorder caused by the presence of an extra Y chromosome. A diagnosis of XYY syndrome is made based upon a thorough clinical evaluation, a detailed patient history, and specialized tests (i.e., chromosomal analysis) that detect the presence of an extra Y chromosome (47,XYY karyotype). Individuals who had a prenatal diagnosis of XYY syndrome and are between the ages of five and twenty years may wish to participate in a study being conducted to determine mental and behavioral outcomes connected with this syndrome. hw.healthdialog.com /kbase/nord/nord812.htm   (1823 words)

XYY SYNDROME: Contact a Family - for families with disabled children: information on rare syndromes and disorders XYY syndrome is a chromosomal condition which occurs only in males and is found with a frequency of 1 in 1,000. The extent to which such an individual is affected by XYY syndrome depends upon the proportion of XYY cells to XY cells throughout the body. XYY occurs sporadically and is not usually passed on from a XYY father to his sons. www.cafamily.org.uk /Direct/x15.html   (861 words)

XYY -- Stereotype of the Karyotype The famous Nielsen letter in Lancet Sept 7, 1968 claiming that the prevalence of XYY men in prison was "25-60 times as high as the prevalence in the general population" remains a shocking example of how to mislead the public using small-sample statistics -- there were only two XYY's identified in the study. One of the 16 XYY's was a habitual criminal, and half of the total of 36 convictions of XYY men were his. Because the author did not mention that one of the XYY's in the study was a career criminal, readers might misunderstand her talk about a greatly increased conviction rate for XYY's. www.pathguy.com /xyy.htm   (3157 words)

Jornal de Pediatria - XYY male with total anomalous pulmonary venous return and short stature   (Site not responding. Last check: ) However, we think it is important to report that there was a poor prognosis case of XYY male with congenital heart disease and short stature. XYY masculino é uma anomalia cromossômica e considera-se que estes indivíduos têm uma estatura relativamente alta. Há relatos de casos de problemas comportamentais em alguns pacientes. Indivíduos masculinos XYY costumam ser relativamente altos e podem ter alguns problemas de comportamento, mas a estimativa de vida não é ruim (6). www.scielo.br /scielo.php?script=sci_arttext&pid=S0021-75572003000100015   (1780 words)

The XYY Man The XYY Man can't believe his eyes when he sees the two priceless miniatures set high on the wall. And when, inevitably, the XYY Man's criminal genes get going and he jumps headlong into danger, he soon finds that the miniatures aren't the only thing that Thresher has framed... Although it was completely irrelevant, the Speck defence helped popularise the XYY theory of deviancy, and for a while the whole nonsense hung around like a bad smell, before gradually fading away. www.trashfiction.co.uk /xyy_man.html   (879 words)

XYY Boys - DrGreene.com Most XYY boys tend to be tall (by mid-childhood), with large teeth, long ears, a long face, and long hands and feet. XYY boys tend to be clumsier (especially in fine motor skills like cutting, pasting, and handwriting), develop more slowly, and often have delayed puberty. XYY boys are often (but by no means always) more aggressive and less tuned in to the feelings of others than their counterparts. www.drgreene.com /21_815.html   (1488 words)

nederlandse XYY vereniging XYY komt volgens onderzoek bij ongeveer 1 op de 1000 mannen voor. In de gevallen dat XYY wordt onderkend is dat dan ook vaak bij onderzoek voor de Jongens met XYY zijn vaak lichamelijk actiever dan hun broertjes. www.xyy.nl   (269 words)

DDHealthInfo - Private Library   (Site not responding. Last check: ) XYY syndrome is the condition in which males have two Y chromosomes and the chromosome constitution 47,XYY rather than the usual one Y chromosome. XYY boys commonly develop normally in childhood, and their intelligence is usually within the normal range. XYY males do not demonstrate an increased risk of diseases in childhood or adulthood. www.ddhealthinfo.org /doc.asp?ID=5199   (678 words)

Online Ethics Center: Ethics in the Science Classroom- Case Study 5: The XYZ Controversy   (Site not responding. Last check: ) The XYY controversy offers a case study that dramatically illustrates many of the ethical issues that arise when efforts are made to explore the social implications of human genetic differences. If this was not sufficient to persuade the public that XYY individuals were potentially dangerous social misfits, the erroneous report that a vicious serial killer of eight student nurses in Chicago was an XYY male surely had that result. Several research projects underway during the 1960s were aimed at examining the actual prevalence of the XYY karyotype in the general population and attempting to explore whether there were any phenotypic consequences, including predisposition to any form of abnormal social behavior. onlineethics.org /edu/precol/classroom/cs5.html   (1512 words)

POLITICS & IQ - The New York Review of Books The history of XYY research is the history of a field marred by extravagant claims based on scanty and uncontrolled data. Much XYY research, for example, was funded by the Law Enforcement Assistance Administration of the Justice Department and the Center for the Study of Crime and Delinquency of the National Institute of Mental Health. In the latter case, parents of XYY males were often told of their son's "affliction," resulting in the likelihood of serious parental anxiety and the attendant effects on the family and child. www.nybooks.com /articles/8553   (956 words)

Chapter 4, Ethics in the Science Classroom The XYY controversy offers a case study that dramatically illustrates many of the ethical issues that arise when efforts are made to explore the social implications of human genetic differences. XYY males were predisposed to violent and criminal behavior. By the mid-1960s XYY was being referred to as the "criminal chromosome." In 1968 lawyers in at least two cases succeeded in persuading juries that their clients were less culpable for their crimes because they were XYY males. www.wmich.edu /ethics/ESC/cs5.html   (1445 words)

V The first case of an XYY pattern was reported in 1962, and a dozen more were added in the next three years. Of the nine XYY males, seven were considered to be subnormal in IQ. In view of the recent reports in popular magazines on the XYY male, this information may be more threatening to his parents than a diagnosis of severe mental retardation. www.asa3.org /ASA/PSCF/1969/JASA6-69Anderson.html   (984 words)

Human Chromosomal Abnormalities:  Sex Chromosome Abnormalities The frequency of XYY syndrome is not certain due to statistical differences between different studies. Early studies of XYY syndrome done in European prisons initially led to the erroneous conclusion that these men were genetically predisposed to antisocial, aggressive behavior, below average intelligence, and homosexuality. Contributing to the early view that XYY syndrome men have serious personality disorders was the case of Richard Speck. anthro.palomar.edu /abnormal/abnormal_5.htm   (1047 words)

Genetic Screening Genetic screening is a process by which a population is tested to determine which individuals possess the gene for a certain genetic disease. It was also noted that men in possession of the XYY genotype tended to be taller than ordinary men. It was revealed that XYY studies consistently omitted a control group of normal XYY males, tended to downplay environmental factors that influence aggression and mental health, and simplistically defined complex behaviors such as aggression. library.thinkquest.org /17109/screening.htm   (799 words)

Long term outcome in children of sex chromosome abnormalities -- Ratcliffe 80 (2): 192 -- Archives of Disease in ... XYY boy was 7.6 cm taller than the controls at 151 cm. In early childhood the XYY boys were more active and ate and slept better than controls. Psychiatric referrals were made for 47% of the XYY boys compared with 9% of the male controls. adc.bmj.com /cgi/content/full/80/2/192   (2993 words)

XYY Syndrome: Chromosomal and Genetic Abnormalities: Merck Manual Home Edition The XYY syndrome is a disorder in which a male infant is born with an extra Y chromosome. Boys with XYY syndrome tend to be tall and have difficulties with language. The XYY syndrome was once thought to cause aggressive or violent criminal behavior, but this theory has been disproved. www.merck.com /mmhe/sec23/ch266/ch266h.html   (103 words)

XYY Parents : A Support Site While a large percentage of males with XYY function normally in society, and are often unaware they they have the chromosomal abnormality, for many families the XYY Syndrome presents itself with significant challenges. It is difficult to stereotype an XYY male as they seem to present such different charactaristics to varying degrees. This web site will grow to be a great way to quickly share information and resources and educate visitors on the key issues of the syndrome. mysite.verizon.net /xyyparents   (246 words)

XYY Case Study   (Site not responding. Last check: ) A study performed in 1965 of 197 males that were institutionalized for violent and dangerous antisocial behavior found that 9 of them (4.5% of the males in the survey) had an XYY karyotype. For this assignment you will be asked to look on the Internet for legitimate resources on XYY Syndrome to help you answer these questions. Identify any post 1965 studies conducted on the topic of XYY Syndrome and its links (or lack there of) to aggression, personality disorders, or criminal behavior. udel.edu /~pmwalsh/XYY.html   (182 words)

XYY Syndrome Boys with XYY syndrome often are more physically active than their brothers, and if this activity is canalized into play,sports or other physical activities with parent and other children, this fact is in no way negative. Boys with XYY syndromehave a tendency to a delayed mental maturation, and in connection with an increased tendency for learning-problems inschool, this means a need for early and adequate stimulation. Commonly XYY boys develop normally inchildhood, and their intelligence is usually within the normal range. www.aaa.dk /TURNER/ENGELSK/XYYEN.HTM   (322 words)

XYY syndrome - WrongDiagnosis.com XYY syndrome (medical condition): A rare chromosomal genetic syndrome where the male person has an extra Y male chromosome, becoming XYY instead of normal XY (male) or XX (female). The person is male and may be mostly normal, or may suffer from minor features from excess male hormones, such as excess acne being very tall, and in some cases behavioral complaints such as aggression. XYY syndrome is listed as a "rare disease" by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH). www.wrongdiagnosis.com /medical/xyy_syndrome.htm   (415 words)

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