The analysis of all the studies proves that there are no statistical evidence that a 47,XYY man is predisposed to aggressive and deviant behavior. The presence of an extra Y can be considered only a genetic substrate, which cannot be the only cause of deviant behaviors.
Does XYY syndrome cause aggression?
Although individuals with XYY syndrome have an increased risk for learning disabilities and behavioral problems, they are not overly aggressive, nor are they at an increased risk of any serious mental illness.
Do serial killers have an extra chromosome?
According to Dr Helen Morrison, an American forensic psychologist and writer, chromosome abnormality in serial killers begins to express itself during puberty. Serial killer, Bobby Joe Long has an extra X chromosome, causing him to produce excess amount of oestrogen.
Can XYY syndrome be cured?
There’s no cure for XYY syndrome, but treatments can help with specific symptoms. Finding services early is important and can greatly increase their ability to help boys live a healthier, more productive life.
Are serial killer born or made?
According to some criminologists, both biological and social factors lead to the making of this type of murderer (Raine, 2008). Researchers have found that environment and genetics routinely go hand-in-hand to encourage brutal behavior (Fox, 2017).
Does the extra Y chromosome cause aggressive behavior in XYY males?
Viewpoint: No, the presence of the extra Y chromosome in XYY males does not in and of itself produce aggressive behavior in those affected; dealing with aspects of the condition during adolescence is a more likely explanation for any later social difficulties experienced by XYY males.
What causes 4747 XYY syndrome?
47,XYY syndrome is caused by the presence of an extra copy of the Y chromosome in each of a male’s cells. As a result of the extra Y chromosome, each cell has a total of 47 chromosomes instead of the usual 46.
What is the prognosis for 47 XYY syndrome?
Most males with 47,XYY syndrome have normal production of the male sex hormone testosterone and normal sexual development, and they are usually able to father children. 47,XYY syndrome is associated with an increased risk of learning disabilities and delayed development of speech and language skills.
Is mosaicism 46xy/47xyy inherited?
46,XY/47,XYY mosaicism is also not inherited. It occurs as a random event during cell division in early embryonic development. As a result, some of an affected person’s cells have one X chromosome and one Y chromosome ( 46,XY ), and other cells have one X chromosome and two Y chromosomes (47,XYY).
