“This abnormality is pretty common among chromosomal disorders. It happens in 1/500 to 1/1000 of male babies. It shows symptoms like height over 180cm, a longer torso and limbs, weak muscle strength, uncoordinated movement, lack of symmetry in the face, long ears, and skin lesions. Although patients typically have normal IQ development, most of them have below average IQ. Their personalities are often abnormal from childhood. They tend to be very unstable and prone to outbursts, cruel, impatient, unable to withstand frustration, quick to anger, and can often display impulsive violent behaviour. When they’re in non-ideal situations, they can often become anti-social and gain other mental disorders. Scientifically, they’re referred to as supermale, but actually 15-20% of patiences have medium level hormone deficiency, with few sperm or mutated sperm. They can have normal offspring, abnormal offspring, or not offspring.
According to statistics, XYY patients are more prone to being criminals than normal people, up to several times or a dozen times the norm. It’s also important to note that another chromosomal disorder, XXY patients, also have elevated crime rates, and is very similar to XYY patients. This means that the extra Y chromosome is not the deciding factor. The deciding factor is more probably the lowered IQ and central nervous system abnormalities.
Lately, scientists have pointed out that using “biological factors” to explain the source of crime is not accurate.”
-Moly, “5-29-2023 A couple of villages in Minnan will even feed newborns live earthworms.” weibo.substack.com. May 29, 2023
I found this post interesting for a number of reasons. One, I had heard of having an extra XYY chromosome tends to lead to more violent behavior and there is a statistically higher significance of people with this mutation being in jail. But, I had never heard of the XXY mutation, which is more common. But, the last bit drew me in. Looking for research on it, I found this:
“The overall risk of conviction (excluding traffic offenses) was moderately increased in men with 47,XYY or KS; however, it was similar to controls when adjusting for socioeconomic parameters. Convictions for sexual abuse, burglary, arson and ‘others’ were significantly increased. The increased risk of convictions may be partly or fully explained by the poor socioeconomic conditions related to the chromosome aberrations.”
-Stochholm K, Bojesen A, Jensen AS, et al.
“Criminality in men with Klinefelter’s syndrome and XYY syndrome: a cohort study.” BMJ Open 2012;2:e000650. doi: 10.1136/bmjopen-2011-000650
It’s an interesting distinction. People with these chromosomal differences are more likely to be impacted socioeconomically, which makes them more likely to be sent to jail. So, another example of correlation does not equal causation.
cafebedouin.org 