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	Fragile X syndrome - Wikipedia, the free encyclopedia
		The fragile X syndrome is a genetic disorder caused by mutation of the FMR1 gene on the X chromosome.
		Fragile X syndrome was originally diagnosed by culturing cells in a folate deficient medium and then assessing the cultures for X-chromosome breakage by cytogenetic analysis of the long arm of the X chromosome.
		Persons with the fragile X syndrome in their family histories are advised to seek genetic counseling to assess the likelihood of having children who are affected, and how severe any impairments may be in affected descendants.
	en.wikipedia.org /wiki/Fragile_X_syndrome (809 words)

	Facts About Fragile X Syndrome
		She would be a "carrier." On the other hand, a male who inherits the Fragile X gene from his mother would inherit a Y chromosome and not a normal X chromosome from his father, and therefore a male with one copy of the gene is likely to show symptoms.
		The observable characteristics of Fragile X occur in approximately 1 in 1,000 male births and 1 in 2,500 female births.
		The nature of the Fragile X mutation may itself be a source of the difficulty scientists are having in developing an animal model of the disease.
	childdevelopmentinfo.com /disorders/facts_about_fragile_x_syndrome.htm (2915 words)

	Fragile X
		Fragile X syndrome (also known as Martin-Bell syndrome, Marker X syndrome, and FRAXA syndrome) is the most common cause of genetic mental impairment.
		Because women carry two X chromosomes, they are twice as likely to be carriers of the disease; it is estimated that 1 in 400 women and 1 in 800 men carry the mutation that causes Fragile X.
		Fragile X Syndrome is caused by a mutation in a specific gene carried on the X chromosome.
	www.residentialopportunities.org /html/fragile_x.html (1314 words)

	FMR1-Related Disorders
		The diagnosis of fragile X syndrome is suspected in males with moderate mental retardation and females with mild mental retardation.
		Fragile X syndrome is a trinucleotide repeat disorder that may demonstrate anticipation in some families.
		The prevalence of females affected with fragile X syndrome is presumed to be approximately one-half the male prevalence.
	www.geneclinics.org /profiles/fragilex/details.html (4419 words)

	Fragile X Syndrome (Site not responding. Last check: 2007-10-23)
		Fragile X syndrome is a form of mental retardation caused by a mutated gene on the X chromosome.
		Fragile X syndrome is caused by a mutation in the FMR-1 (Fragile X Mental Retardation) gene, located on the X chromosome.
		Fragile X syndrome is diagnosed based upon developmental delays, behavioral characteristics, and physical traits.
	www.hmc.psu.edu /childrens/healthinfo/f/fragilex.htm (1103 words)

	Fragile X Syndrome
		Fragile X is the most common inherited cause of mental impairment and the most common known cause of autism, affecting approximately 1 in 4000 males and 1 in 6000 females with the full mutation worldwide.
		Fragile X also includes fragile X associated tremor ataxia syndrome (FXTAS), a balance, tremor and memory condition that affects some older male carriers of the pre-mutation.
		The fragile X premutation can be passed silently down through generations in a family before a child is affected by the syndrome.
	mc2.vicnet.net.au /home/hihowru/web/index.html (498 words)

	Fragile X syndrome
		Fragile X syndrome is caused by a mutation in the FMR-1 gene, located on the X chromosome.
		Fragile X syndrome is caused by a mutation in a gene called FMR-1.
		Fragile X syndrome inherited in an X-linked dominant manner (characters are transmitted by genes on the X chromosome).
	www.healthatoz.com /healthatoz/Atoz/ency/fragile_x_syndrome.jsp (1953 words)

	fragile X syndrome
		Fragile X syndrome is the most common cause of inherited developmental delay.
		Fragile X syndrome should be suspected whenever a boy presents with unexplained mental retardation, developmental delay, or behavioral signs such as hand-flapping movements, hyperactivity, attention deficits or autistic like behaviors, especially if there is a family history of similarly affected males.
		There is no cure for fragile X syndrome, but therapy for children with fragile X is individualized, is aimed at encouraging their strengths and remediating weak areas, and is best started as early in life as possible.
	www.drhull.com /EncyMaster/F/fragile_X_syndrome.html (479 words)

	Fragile X Overview
		Fragile X syndrome is the most common known cause of mental retardation and developmental disabilities, with an incidence of between 1:2500 and 1:4,000 births.
		Fragile X is associated with a wide spectrum of characteristics, which may or may not be seen in a given individual.
		These individuals are normal with respect to fragile X syndrome, and usually carry no risk of transmitting it, although the 40—60 repeat range is sometimes considered a "gray zone" which may or may not be unstable (have a risk of expanding).
	www.fpg.unc.edu /~fx/Pages/overvu.htm (1730 words)

	Fragile X Syndrome (Site not responding. Last check: 2007-10-23)
		Fragile X is an X-linked mutation disorder where he genetic mutation involves unstable trinucleotide repeats (CGG) associated with a fragile site near the tip of the long arm of the X chromosome.
		Fragile X syndrome occurs in at least 1 in 1000 males.
		This is because the father passes a Y chromosome to the son, and an X to the daughter.
	www.dpo.uab.edu /~birmie/frag.htm (526 words)

	BBC - Health - Conditions - Fragile X syndrome (Site not responding. Last check: 2007-10-23)
		Fragile X syndrome (or Martin-Bell syndrome) is the most common inherited cause of learning disability.
		In fragile X, one of the genes on the X chromosome is faulty.
		Fragile X affects about one in 2,000 males and one in 4,000 females of all races and ethnic groups.
	www.bbc.co.uk /health/conditions/fragilex1.shtml (565 words)

	Fragile X syndrome
		Fragile X syndrome is a genetic disorder caused by an alteration in the X chromosome (that is, a change in the DNA structure).
		The altered gene is on the X chromosome.
		The facts about Fragile X are complicated, and parents and family members are invited to ask their doctor to refer them to a genetics clinic.
	www.disability.vic.gov.au /dsonline/dsarticles.nsf/pages/Fragile_X_syndrome?OpenDocument (644 words)

	MD Fragile X Homepage
		The Maryland Fragile X Resource Group is a community of families in and around the Washington-Baltimore metro area that have children affected by Fragile X Syndrome.
		Fragile X is one of the most common inherited diseases.
		While the exact prevalence of Fragile X is unknown, recent studies indicate that 1 in 2000 boys and 1 in 4000 girls are estimated to be affected with Fragile X Syndrome.
	www.mdfragilex.org (374 words)

	Fragile X syndrome - Genetics Home Reference
		Fragile X syndrome is a genetic condition that causes a range of developmental problems including learning disabilities and mental retardation.
		Fragile X syndrome occurs in approximately 1 in 4,000 males and 1 in 8,000 females.
		Mutations in the FMR1 gene cause fragile X syndrome.
	ghr.nlm.nih.gov /condition=fragilexsyndrome (862 words)

	Cell Biology Lab- Fragile X Syndrome
		The disease Fragile X syndrome is the most common form of inherited mental retardation in humans.
		Poustka A. Fragile X syndrome: molecular analysis reveals a new mechanism of mutation in human genetic diseases.
		X inactivation of the FMR1 fragile X mental retardation gene.
	anatomy.med.unsw.edu.au /cbl/research/neurons/fx1.htm (658 words)

	What is Fragile X - Could it be caused from parents' being chemically overexposed to 2-butoxyethanol? ... a ...
		It includes fragile X syndrome (FXS), the most common cause of genetically-inherited mental impairment ranging from subtle learning disabilities and a normal IQ, to severe cognitive or intellectual challenges (often still referred to as mental retardation) including autism or "autistic-like" behavior.
		Fragile X can also include problems for female carriers such as early menopause, medically referred to as premature ovarian failure (POF).
		Fragile X can be passed on in a family by individuals with no apparent sign of the condition.
	home.gci.net /~blessing/pages/fragilex.htm (339 words)

	Your Child \| Fragile X syndrome
		Fragile X is the most common inherited form of mental retardation.
		It is caused by mutation of a gene (FMR1) on the X-chromosome.
		Women who have a family history of Fragile X or of undiagnosed mental retardation and who are seeking reproductive counseling should be tested to see if they are carriers.
	www.med.umich.edu /1libr/yourchild/fragilex.htm (1045 words)

	GeneCare Medical Genetics Center - Fragile X DNA Testing
		Fragile X (Fra X) syndrome is the most common inherited type of mental retardation.
		An individual with Fra X may be hyperactive, show signs of autism such as poor eye contact, have rapid repetitive speech, hand biting and flapping, hypersensitivity to light or sound, and difficulty in adapting to changes.
		Some females who inherit the Fra X gene on one of the X chromosomes are affected while some other females are protected from the harmful effects of the abnormal gene by the normal gene on the other X chromosome.
	www.genecare.com /fx.html (936 words)

	Parenting and Child Health - Health Topics - Fragile X
		It is called Fragile X because it is caused by a change on one of the X chromosomes.
		If females have the Fragile X change on one chromosome, the other X chromosome may balance or compensate for the abnormal section of the chromosome, and they may be totally unaffected by the Fragile X section, or only mildly affected.
		About one in 260 women are carriers of the Fragile X gene which can be passed on to their sons or daughters.
	www.cyh.com /HealthTopics/HealthTopicDetails.aspx?p=114&np=306&id=1929 (1279 words)

	Fragile X (Site not responding. Last check: 2007-10-23)
		Fragile X Syndrome is probably the commonest single-gene cause of learning disability in humans with an estimated prevalence of 1 in 4000- 1 in 6000 males, where it causes moderate to severe intellectual and social impairment together with syndromic features including large ears and head, long face and macroorchidism
		Although the physical Fragile X phenotype is usually well established in post-pubertal males, this is not true of females and young children where the full mutation phenotype is variable and often subtle.
		Fragile X genotype characterized by an unstable region of DNA.
	www.cmgs.org /BPG/Guidelines/2005/FX.htm (4699 words)

	Special Child: Disorder Zone Archives - Fragile X Syndrome
		Fragile X is a genetic disorder that is caused by a break or weakness on the long arm of the X chromosome (females have two X chromosomes and males have one X and one Y).
		Fragile X is estimated to occur in 1 in 1,200 males and 1 in 2,500 females.
		Females tend to be more mildly affected by the fragile X gene than males because females have a second X chromosome to compensate for the defective gene on the affected X chromosome.
	www.specialchild.com /archives/dz-008.html (3187 words)

	eMedicine - Fragile X Syndrome : Article by Jennifer Jewell, MD (Site not responding. Last check: 2007-10-23)
		Fragile X syndrome is an inherited disorder and is present at birth.
		The phenotype of fragile X syndrome is difficult to diagnose in prepubertal children.
		Recommending prepregnancy or prenatal fragile X syndrome screening to women with a family history of fragile X syndrome or mental retardation and to women with learning difficulties and/or mental retardation is advisable.
	www.emedicine.com /ped/topic800.htm (3223 words)

	Medical References: Fragile X Syndrome
		Fragile X syndrome is a genetic disorder that runs in families.
		Fragile X syndrome can be passed from a carrier mother to her children.
		The daughters generally have no symptoms of fragile X syndrome, but they are carriers of a pre-mutation that may be passed on to their children.
	www.marchofdimes.com /professionals/681_9266.asp (1599 words)

	Stanford Psychiatry Neuroimaging Laboratory: Fragile X
		Fragile X syndrome is a common hereditary cause of mental retardation and learning disability.
		Individuals with the full mutation of the gene have fragile X syndrome, while individuals with the premutation of the gene usually are usually not affected.
		Individuals with the premutation, however, are at risk for having a child with the full mutation and fragile X syndrome.
	spnl.stanford.edu /disorders/fragilex.htm (442 words)

	Fragile X (Site not responding. Last check: 2007-10-23)
		Fragile X syndrome is the leading inherited form of mental impairment, affecting about one person in 3,000 worldwide.
		This disorder is caused by large expansions of a three-base (CGG) repeat within the fragile X gene.
		The laboratory is pursuing the development of new approaches for treating fragile X syndrome.
	wizard1.ucdavis.edu /Research/fragilex.htm (233 words)

	What is Fragile X Syndrome?
		What is Fragile X? Fragile X is a family of genetic conditions, which can impact individuals and families in various ways.
		Fragile X can be passed on in a family by individuals who have no apparent signs of this genetic condition.
		The National Fragile X Foundation (NFXF) has been helping individuals with Fragile X, their families, and the professionals who work with them, since 1984.
	www.fragilex.org /html/what.htm (269 words)

	Fragile X Syndrome
		One of the Fragile X Society's aims is to raise awareness among professionals of this still little heard of condition.
		Fragile X Syndrome is a genetically inherited condition that is passed through generations on the X chromosome.
		Fragile X is the most common inherited cause of learning disability.
	www.speechmag.com /archives/edeltuckwood.html (2725 words)

	Fragile X syndrome (Site not responding. Last check: 2007-10-23)
		Fragile X syndrome is a genetic condition involving changes in the long arm of the X chromosome.
		Fragile X syndrome is the most common form of inherited mental retardation in males and a significant cause in females.
		There are very few outward signs of Fragile X syndrome in babies but one is a tendency to have large head circumference.
	www.shands.org /health/information/article/001668.htm (434 words)

	Fragile X Syndrome (Site not responding. Last check: 2007-10-23)
		Fragile X syndrome is the single most common inherited cause of mental impairment.
		Because the symptoms of fragile X can be quite subtle, especially in young children, and because fragile X is so frequent in the general populations, many medical specialists recommend that testing for fragile X be considered for any individual with otherwise unexplained developmental delay or mental retardation.
		Fragile X Syndrome is caused by an abnormal gene on the bottom of the X chromosome.
	ericec.org /faq/fragilex.html (2475 words)

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