Xyy syndrome (double y): symptoms workup diagnosis treatment complications causes epidemiology incidence prognosis xyy syndrome is a genetic condition where an extra copy of a y chromosome is present in each of the cell of human male, resulting in 47 chromosomes instead of 46. Recently a large study in persons with ks and 47,xyy covering all diagnosed criminality in men with klinefelter's syndrome and xyy syndrome: a cohort study. Xyy males and their families another name for jacob’s syndrome is the 47, xyy syndrome the primary objective of this two-part study is to understand the .
Xyy syndrome student id # _____ a study performed in 1965 of 197 males that were institutionalized for violent and dangerous antisocial behavior found that 9 of them (45% of the males in the survey) had an xyy karyotype. Xyy syndrome is a rare chromosomal disorder that affects males it is caused by the presence of an extra y chromosome males normally have one x and one y chromosome. This psychological study of the personalities of xyy- and xxy-men is part of a multidisciplinary investigation of non-institutionalized males with sex chromosome aberrations past and present views on these conditions have presented contradictory statements reflecting the enthusiasm with which .
In a comparison study that included a control group, a research group found boys with xyy syndrome as with ks have varying levels of language impairment at both simple and complex levels both the xyy and the ks boys performed less well, on average than the control group in tests of general cognitive ability, language, achievement, verbal . The results of our previous pilot study on the frequency of the xyy genotype in prisoners (four in 100) and outpatients (two in 100) with nca are discussed in relation to the 44% (seven in 16) frequency of nca in three series of xyy subjects in whom the presence of nca was sought and recorded. Impulse, aggression and sexuality in the xyy syndrome all too little study of the psychology of the xyy individual in regard to either this so-called aggression . Objective to investigate the criminal pattern in men between 15 and 70 years of age diagnosed with 47,xxy (klinefelter's syndrome (ks)) or 47,xyy compared to the general population design register-based cohort study comparing the incidence of convictions among men with ks and with 47,xyy with age . 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 some medical geneticists question whether the term syndrome is appropriate for this condition because its phenotype is normal and the vast majority (an estimated 97% in the uk) of .
Xyy syndrome to another 22 the field within the science of biology that studies heredity is called genetics, and behavior genetics bridges the sciences of psychol-. The second study that describes social development in 47, xyy is the recent study by bishop et al (2010) described earlier in this conservatively identified sample, 20% of males with 47, xyy had asd diagnoses according to parent report. Xyy syndrome is a genetic condition in which males have 47 chromosomes instead of the usual 46 chromosomes the karyotype is written as 47,xyy as these males have an extra y chromosome xyy occurs in approximately one in 1000 live male births and falls into the category of sex chromosome aneuploidy. Brain morphology in children with 47,xyy syndrome: a voxel and surface-based morphomeric study authors: jean-francois lepage, david s hong, mira raman, matthew marzelli, david p roeltgen, song lai, judith ross, and allan l reiss. The xyy syndrome is of particular interest since the extra y chromosome seems to be related to personality traits and criminal behavior this study was supported .
The study calculated the xyy frequency in juvenile offenders as 10 times that of the general population based on just 2 xyy boys, and calculated the xyy frequency in the mental hospital patients based on just 1 xyy patient. A study by aksglaede describing 9 boys, ages 92-20 years, also reported 1 boy with an extremely high fsh and an immeasurably low inhibin b 18 this constellation can be seen in sertoli-cell-only syndrome, which has been reported in adults with xyy,11, 45, 46, 47 and is associated with decreased fertility. 47,xyy syndrome is characterized by an extra copy of the y chromosome in each of a male's cells although many males with this condition are taller than average, the chromosomal change sometimes causes no unusual physical features.
Are xyy males more prone to aggressive behavior than xy males perhaps the best study of the psychology of xyy men and aggression was xyy syndrome is not . Charlie has xyy syndrome, which is a condition where a boy has an extra y chromosomein some ways, it is the opposite of klinefelter syndrome: whereas zack has an extra x chromosome, but a normal . Xyy syndrome, jacob syndrome xyy syndrome, better known as the jacob syndrome is a rare genetic disorder which affects males due to an extra y chromosome. 47, xyy syndrome is a syndrome (group of signs and symptoms) that affects males for some males with this syndrome, signs and symptoms are barely noticeable for others, signs and symptoms may include learning disabilities, speech delay, low muscle tone (hypotonia), and being taller than expected.