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Topic: 47,XYY syndrome


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In the News (Wed 3 Sep 14)

  
  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.
Males with this syndrome may be slightly taller than average and are typically a few centimeters taller than their father and siblings.
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)

  
 47,XYY syndrome - Genetics Home Reference
Males with 47,XYY syndrome are sometimes taller than average and have an increased risk of learning disabilities and delayed speech and language skills.
47,XYY syndrome is a chromosomal condition related to the Y chromosome.
47,XYY syndrome is caused by the presence of an extra copy of the Y chromosome in each of a male's cells.
ghr.nlm.nih.gov /condition=47xyysyndrome   (626 words)

  
 Endotext.com - Endocrinology Of Male Reproduction, Chapter 6
This syndrome was first described by Harry Klinefelter in 1942 as a clinical condition with small testes, azoospermia, gynecomastia and an elevated serum FSH (37).
Men with Klinefelter syndrome tend to be tall (mean adult height is about the 80th percentile for the population) and to have relatively long legs compared to their overall height.
The XX-Male Syndrome is characterized by the combination of male external genitalia, testicular differentiation of the gonads and a 46,XX karyotype by conventional cytogenetic analysis.
www.endotext.org /male/male6/male6.htm   (4891 words)

  
 Y Chromosome
Klinefelter syndrome is a chromosomal condition related to chromosomes X and Y. Klinefelter syndrome is caused by the presence of one or more extra copies of the X chromosome in a male's cells.
Variants of Klinefelter syndrome are caused by several extra copies of the X chromosome or extra copies of both the X and Y chromosomes in all of the body's cells.
47,XYY syndrome is caused by the presence of a single extra copy of the Y chromosome in each of a male's cells.
www.net-one.net /ychrom.htm   (1367 words)

  
 XYY Syndrome
Individuals with this syndrome tend to be tall and slim in childhood.
Sotos syndrome is a rare genetic disorder characterized by excessive growth that occurs prior to and after birth (prenatally and postnatally).
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)

  
 47,XYY   (Site not responding. Last check: 2007-10-09)
Individuals with 47,XYY may have hypospadias, small testicles, and undescended testicles (Buyse, 1990), and there may be an association with renal agenesis and renal cystic dysplasia (Rudnik-Schoneborn et al., 1996).
One investigation found that the proportion of 47,XYY cases in a population at increased risk of Down syndrome as a result of maternal serum screening was not greater than expected for the general population (Ryall et al., 2001).
Risk of 47,XYY is not associated with increasing maternal age (Ferguson-Smith and Yates, 1984; Hassold and Jacobs, 1984; Hook, 1981).
www.dshs.state.tx.us /birthdefects/risk/risk26-xyy.shtm   (1475 words)

  
 Sex Chromosome Anomalies: Chromosomal Anomalies: Merck Manual Professional
Similarly, the absence of 1 X chromosome, although it leads to a specific syndrome (Turner's syndrome), is relatively benign, whereas the absence of an autosome is invariably lethal.
Turner's syndrome occurs in about 1/4000 live female births and is the most common sex chromosome anomaly in females.
47,XYY syndrome is 2 Y chromosomes and 1 X, resulting in a phenotypic male.
www.merck.com /mmpe/sec19/ch294/ch294f.html   (1317 words)

  
 CyberGUIDE To Basic Medical Genetics
Autosomal monosomies are lethal but the monosomy for the X chromosome, 45,X (Turner syndrome) is compatible with life, although it is common in aborted embryos.
A lag of the Y chromosome at meiosis of spermatogenesis is thought to be a common cause of 45, X Turner syndrome.
Twenty percent of Turner syndrome result from having one normal X and another X which is an isochromosome for the long arm, essentially lacking a short arm.
www.infolanka.com /org/genetics/cyberguide/bmg-ch08.htm   (1465 words)

  
 [No title]   (Site not responding. Last check: 2007-10-09)
XYY Syndrome: Chromosomal and Genetic Abnormalities: Merck Manual Boys with XYY syndrome tend to be tall and have difficulties with language.
In rare cases there is a combination of Klinefelter's syndrome and XYY with the chromosome constitution 48 Sex Chromosome Problems Discovered Through Prenatal Diagnosis Boys and men with 47,XYY syndrome look like other to have a child with 47,XYY syndrome or any other.
XYY Syndrome The frequency is approximately 1 of 1000 men, i.e.in Denmark, with 5 millions inhabitant, there are 3000 boys and men with XYY syndrome.
ilbrokerrts18.sarcleunfill.org   (300 words)

  
 XXYY Syndrome and the XXYY Project
48, XXYY syndrome is a sex chromosome variation that affects one in every 17,000 boys who are born.
The incidence of 48,XXYY syndrome was originally estimated at 1/50,000 (Sorensen et al., 1978), but a recent report found the 48,XXYY karyotype in 1/17,000 males in a newborn screening (Nielsen et al., 1991).
XXYY is sometimes considered a variant of another syndrome called Klinefelter Syndrome, or 47 xxy.
www.xxyysyndrome.org /whatisxxyysyndrome.html   (409 words)

  
 XYY Syndrome   (Site not responding. Last check: 2007-10-09)
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.
For parents, who have been informed through prenatal examination, that the foetus has the karyotype 47,XYY, we canmediate contact to parents, who have a son with the XYY syndrome, and such a contact can also be arranged if the diagnosis XYY syndrome is made at a later stage.
www.aaa.dk /TURNER/ENGELSK/XYYEN.HTM   (322 words)

  
 Slashdoc - XYY
XYY Syndrome is a rare genetic disorder which affects males due to an extra Y chromosome.
Men with XYY syndrome have 47 chromosomes, two of which are Y chromosomes.
The characteristics of XYY syndrome are often very subtle and do not indicate and serious chromosomal disorder.
www.slashdoc.com /documents/87544   (443 words)

  
 47,XYY - Susan's Place Transgender Wiki
XYY, or "XYY 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.
Persons with this syndrome may be slightly taller than average, or have more severe acne than normal.
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.
wiki.susans.org /index.php/XYY   (430 words)

  
 Orphanet Journal of Rare Diseases | Full text | Lujan-Fryns syndrome (mental retardation, X-linked, marfanoid habitus)
The Lujan-Fryns syndrome or X-linked mental retardation with marfanoid habitus syndrome is a syndromal X-linked form of mental retardation, affecting predominantly males.
The syndrome is associated with mild to moderate mental retardation, distinct facial dysmorphism (long narrow face, maxillary hypoplasia, small mandible and prominent forehead), tall marfanoid stature and long slender extremities, and behavioural problems.
The Lujan-Fryns syndrome or X-linked mental retardation with marfanoid habitus syndrome (OMIM 309520) is a syndromal X-linked form of mental retardation (mild to moderate mental retardation), associated with tall, marfanoid stature, distinct facial dysmorphism and behavioural problems.
www.ojrd.com /content/1/1/26   (1191 words)

  
 XYY Parents : A Support Site   (Site not responding. Last check: 2007-10-09)
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)

  
 [No title]
The XYY Man. Genetics Influencing Aggression (historical scientifically 47, XYY syndrome is characterized by an extra copy of the Y chromosome in each of Most males with 47, XYY syndrome have normal sexual development and are
with 5 millions inhabitant, there are 3000 boys and men with XYY syndrome.
Zij hebben dan 2 in plaats van 1 Y chromosoom in iedere cel van het lichaam (XYY) kenmer te vinden dat duidt op XYY.
www.odo.technetium.be /xyy   (245 words)

  
 Medical Dictionary: 47 XYY syndrome - WrongDiagnosis.com
47 XYY syndrome is listed as a "rare disease" by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH).
This means that 47 XYY syndrome, or a subtype of 47 XYY syndrome, affects less than 200,000 people in the US population.
Terms that may be interchangeable with 47 XYY syndrome:
www.wrongdiagnosis.com /medical/47_xyy_syndrome.htm   (267 words)

  
 XYY syndrome - Wikipedia, the free encyclopedia
As with 47,XXY boys and 47,XXX girls, IQ scores of 47,XYY boys average 10–15 points below their siblings.
About 1 in 1,000 boys are born with a 47,XYY karyotype.
The incidence of 47,XYY is not affected by advanced paternal (or maternal) age.
en.wikipedia.org /wiki/47,XYY_syndrome   (859 words)

  
 Case Study 9
Like most patients with 47,XYY syndrome, this patient was phenotypically normal.
47,XYY is seen in approximately 1/1,000 newborn males and results from paternal nondisjunction in meiosis II.
As 47,XYY syndrome results from nondisjunction, karyotyping of parents and/or other family members was not recommended.
www.hcmc.org /a_z/EdSessions/CYGcasestudies/Discussion9.html   (188 words)

  
 www.ddhealthinfo.org - Medical Care Information   (Site not responding. Last check: 2007-10-09)
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.
Boys with XYY syndrome have a tendency to delayed mental maturation and an increased tendency for learning problems in school.
Generally diagnosed when prenatal karyotyping is done for the detection of Down syndrome and other major aneuploidies, most XYY males will go through life without being karyotyped.
www.ddhealthinfo.org /ggrc/doc2.asp?ParentID=5199   (686 words)

  
 The National Genetics Education and Development Centre   (Site not responding. Last check: 2007-10-09)
Clinical features: The chromosome pattern is found only in males, the majority have no unusual physical features or medical problems but a small proportion have some symptoms.
Most males with 47,XYY syndrome have usual sexual development and fertility.
The children of an XYY male usually have the usual chromosome pattern.
www.geneticseducation.nhs.uk /practice/common_disorders.asp?id=69   (91 words)

  
 BabyCenter | Readers' Comments - What does it mean when a baby has an extra chromosome?   (Site not responding. Last check: 2007-10-09)
Our genetic counselor even admitted that there was nothing reliable for her to communicate to us, and she gave us a short pamphlet and warm words of encouragement.
There are online discussion/support groups (yahoo for example has one) for xyy syndrome (47,xyy) that are working to make the syndrome more studied, better understood, and less impactful to prospective parents.
You will naturally find more people participating in support groups, chat venues, etc when there is a problem than when there isn't, and there are some males who found out they were xyy later in life have said that their life has been great, and not knowingly impacted by their condition.
www.babycenter.com /comments/pregnancy/prenatalhealth/5279?i=40   (1965 words)

  
 [No title]   (Site not responding. Last check: 2007-10-09)
Health It is possible that the main title of the report XYY Syndrome is not the name additional information including symptoms, causes, affected population, XYY Syndrome - Oconomowoc Developmental Training Center Individuals with XYY Syndrome have one X and two Y chromosomes.
47,XYY syndrome - Genetics Home Reference 47,XYY syndrome is characterized by an extra copy of the Y chromosome in each of a male's cells.
XYY syndrome describes Today we know no definite causes of the Y chromosome in each of chromosome can occur in the developing embryo.XYY Abstract: This project focuses on the causes and effects of XYY Syndrome; is not understood
bondirhtm31.it.hoyashawy.org   (327 words)

  
 [No title]   (Site not responding. Last check: 2007-10-09)
XYY Syndrome - Oconomowoc Developmental Training Center Individuals with XYY Syndrome have one X and two Y chromosomes.
Health It is possible that the main title of the report XYY Syndrome is not the name additional information including symptoms, causes, affected population, General Info - Caring4Health - Caring4Cancer Causes.
XYY syndrome is the condition in which males have two Y chromosomes and the chromosome constitution 47,XYY rather than the usual one
newssmartbill91.snortyopiate.org   (359 words)

  
 47,XYY syndrome Treatment and Symptoms
Home > Conditions > 4 > 47,XYY syndrome
XYY syndrome is an aneuploidy (specifically a trisomy) of the sex chromosom...
Your Integrative Health and Wellness Resource for 47,XYY syndrome.
goldbamboo.com /topic-t6932.html   (261 words)

  
 Mission Statement   (Site not responding. Last check: 2007-10-09)
Any other form of sex chromosome aneuploidy We are studying the development, behavior, emotions, and physical problems of children and adults with different sex chromosome abnormalities.
Our goal is to further describe the differences that commonly occur in these patients.
We also want to describe the medications that have been helpful in treating the behavioral and emotional challenges in patients with these syndromes.
www.genealogysource.com /tetra_x/news.htm   (261 words)

  
 Meiotic behaviour of the sex chromosomes in three patients with sex chromosome anomalies (47,XXY, mosaic 46,XY/47,XXY ...
Meiotic behaviour of the sex chromosomes in three patients with sex chromosome anomalies (47,XXY, mosaic 46,XY/47,XXY and 47,XYY) assessed by fluorescence in-situ hybridization -- Blanco et al.
Meiotic behaviour of the sex chromosomes in three patients with sex chromosome anomalies (47,XXY, mosaic 46,XY/47,XXY and 47,XYY) assessed by fluorescence in-situ hybridization
In the two patients with Klinefelter syndrome, although variable
humrep.oxfordjournals.org /cgi/content/abstract/16/5/887   (659 words)

  
 [No title]   (Site not responding. Last check: 2007-10-09)
Health It is possible that the main title of the report XYY Syndrome is not the name additional information including symptoms, causes, affected population,
XYY syndrome is the condition in which males have two Y chromosomes and the chromosome constitution 47,XYY rather than the usual one XYY Males - an orientation In rare cases there is a combination of Klinefelter's syndrome and XYY Today we know no definite causes of the chromosome aberration which leads to XYY,
The exact cause of XYY syndrome is a combination of Klinefelter's syndrome and XYY additional information including symptoms, causes, affected population,XYY Abstract: This project focuses on the causes and effects of XYY syndrome is an aneuploidy (specifically a trisomy) of the chromosome aberration which leads to XYY,Sex Chromosome Problems Discovered Through Prenatal Diagnosis 47,XYY syndrome?
hugetradeservice25.hoyashawy.org   (396 words)

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