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Doctor insights on: Xyy Syndrome

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What is XYY syndrome or disease?

What is XYY syndrome or disease?

Extra Y chromosome: About one man in 1000 has an extra Y chromosome and it's likely to be discovered only if there's some investigation because of some problem such as autism. This has given rise to the myth that autism, criminal behavior and so forth are more common in such men. They average taller and tend to get worse acne. The "criminal" claims haven't held up to real science. ...Read more

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What exactly is xyy syndrome or disease?

Usually non-problem: This is a man with an extra y chromosome. These men tend to be tall and to have more troubles with acne than others. A junk-science paper and a false claim by murderer richard speck popularized the myth that these men tend to criminality. If there are no health problems, xyy almost never gets discovered except by prenatal screening; in the latter case it usually causes no troubles. ...Read more

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I was wondering what is xyy syndrome or disease?

XYY: Junior gets two copies of dad's y-chromosome. Most xyy's are discovered incidentally. Reports of low iq may be ascertainment bias. Nobody questions these boys / men are tall and have nasty acne that needs to be treated. Despite "pop" claims of criminality, there are some national studies in which no xyy could be found who'd committed a crime with a weapon. ...Read more

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Can you help me find me a pedigree for a male who has 47, xyy syndrome (xyy syndrome)?

No: There is no such thing as a "pedigree" for xyy. This is a sporadic event and won't be reflected in the rest of the family, either his parents or his children. Learning the fundamental concepts of genetics is subtle. While other chromosomal anomalies (microdeletions, robertsonian and other translocations) can produce typical family trees, xyy won't -- it can't be passed on. ...Read more

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Is there a particular chromosome XYY Syndrome is located? and is it recessive or dominant?

Is there a particular chromosome XYY Syndrome is located? and is it recessive or dominant?

No: XYY syndrome is neither autosomal dominant or recessive. See a geneticist about inheritance patterns. It is often causes by chromosome nondysjunction (lack of separation). There is not a particular chromosome but the sex chromosomes are called X and Y. Females typically are XX and Males XY. XYY is causes by a Y chromosome separation issue. XYY individuals are usually normal males ...Read more

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Is XYY syndrome- Sex-linked-yes or no; particular chromosome; recessive or dominant?

Is XYY syndrome-                                 
      Sex-linked-yes or no; particular chromosome; recessive or dominant?

Klinefelter Syndrome: Hi, Klinefelter Syndrome, or XYY syndrome is a syndrome where males have an extra Y chromosome, which makes them 47 XYY rather than 46 XY. It is not a sex-linked, autosomal dominant, nor autosomal recessive disorder. The inclusion of the extra Y chromosome is thought to be a random event, even in cases of 47 XYY mosaicism. Follow this link: http://ghr.nlm.nih.gov/condition/47xyy-syndrome ...Read more

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How can I recognize if someone has xyy syndrome. What are its symptoms ?

How can I recognize if someone has xyy syndrome. What are its symptoms ?

You can't: XYY's tend to be tall and have more acne than other folks. Beyond this, it's almost always discovered by accident and the vast majority of XYY's have no idea. And it's not worth discovering -- the "natural criminal" business was the result of two junk science papers and a vile murder's false defense. "The guy with the most pimples on the prison basketball team" is just a gag. Best wishes. ...Read more

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Can you tell me if xyy syndrome is sex-linked or autosomal?

Can you tell me if xyy syndrome is sex-linked or autosomal?

Neither: It is a karyotype disorder. The x and y chromosomes are sex chromosomes, but the disorders of chromosomes themselves (aneupolidies, translocations, etc.) are not the classic mendelian disorders that we discuss with respect to "sex-linked" and "autosomal.". ...Read more

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Are men with xyy syndrome more likely to produce male children or not?

Are men with xyy syndrome more likely to produce male children or not?

No: The majority of 47XYY males are fertile and have chromosomally normal offspring. ...Read more

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Can you tell me how can the chromosomal conditions , trisomy x, xyy syndrome and turner syndrome differ?

Can you tell me how can the chromosomal conditions , trisomy x, xyy syndrome and turner syndrome differ?

Good online sites: Xxx and xyy have relatively little impact on those who have them and are usually incidental findings -- this is actually true despite the hoopla over xyy. I have three physician colleagues who have turner's xo and do fine. http://ghr.nlm.nih.gov/ is really good (thanks uncle sam). ...Read more