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.
Some researchers have suggested that the extra Y chromosome is lost before meiosis,3,6–8 thus conserving fertility in these patients. Studies comparing sperm aneuploidy between fertile and infertile XYY men reveal that most sperm produced by XYY men have a normal karyotype.
Superman Syndrome is a genetic disorder in which a male is born with an extra "Y" chromosome. This is a non-disjunction of the 23rd chromosome. There is a theory that men with this disorder tend to have criminal behavior but that is only with rare few men. Most men live normal lives with this disorder
According to Dr Helen Morrison, an American forensic psychologist and writer,chromosome abnormality in serial killers begins to express itself during puberty. ... Conversely, serial killer Richard Speck's had an extra Y chromosome, which his lawyers argued was the cause of his violent crimes
Treatment may include speech therapy or extra help with schoolwork.[3] Outcomes are generally good.[3]Prevention is not possible.[2] The condition occurs in about 1 in 1,000 male births.[1] Many people with the condition are unaware that they have it.[2] The condition was first described in 1961
People with the 47,XYY karyotype have an increased growth velocity from early childhood, with an average final height approximately 7 cm (3") above expected final height.
In contrast to the other common sex chromosome aneuploidies—47,XXX and 47,XXY (Klinefelter syndrome)—the average IQ scores of 47,XYY boys identified by newborn screening programs were not reduced compared to the general population
Some researchers have suggested that the extra Y chromosome is lost before meiosis,3,6–8 thus conserving fertility in these patients. Studies comparing sperm aneuploidy between fertile and infertile XYY men reveal that most sperm produced by XYY men have a normal karyotype.
Superman Syndrome is a genetic disorder in which a male is born with an extra "Y" chromosome. This is a non-disjunction of the 23rd chromosome. There is a theory that men with this disorder tend to have criminal behavior but that is only with rare few men. Most men live normal lives with this disorder
According to Dr Helen Morrison, an American forensic psychologist and writer,chromosome abnormality in serial killers begins to express itself during puberty. ... Conversely, serial killer Richard Speck's had an extra Y chromosome, which his lawyers argued was the cause of his violent crimes
Treatment may include speech therapy or extra help with schoolwork.[3] Outcomes are generally good.[3]Prevention is not possible.[2] The condition occurs in about 1 in 1,000 male births.[1] Many people with the condition are unaware that they have it.[2] The condition was first described in 1961
People with the 47,XYY karyotype have an increased growth velocity from early childhood, with an average final height approximately 7 cm (3") above expected final height.
In contrast to the other common sex chromosome aneuploidies—47,XXX and 47,XXY (Klinefelter syndrome)—the average IQ scores of 47,XYY boys identified by newborn screening programs were not reduced compared to the general population
No comments:
Post a Comment