YY is non-viable. XYY is a relatively common mutation (1/1000 boys). As one might expect, XYY individuals tend to have a stronger dose of testosterone and other androgens.
Some controversial studies have noted the greater concentration of XYY individuals in the prison system than in the general population, and suggested that XYY boys be singled out for counseling and interventions. (Yeah, send them off to 'camps' together.)
Hm, apparently my information was outdated. See, for example, XYY -- Stereotype of the Karyotype (This page, written by a doctor who suspects himself to be an XYY but afraid to check for fear of losing his health insurance, has the agenda of convincing parents not to abort XYY fetuses. He does say, though, that XXYY boys do tend to have lots of problems.)
(no subject)
YY is non-viable. XYY is a relatively common mutation (1/1000 boys). As one might expect, XYY individuals tend to have a stronger dose of testosterone and other androgens.
Some controversial studies have noted the greater concentration of XYY individuals in the prison system than in the general population, and suggested that XYY boys be singled out for counseling and interventions. (Yeah, send them off to 'camps' together.)
Hm, apparently my information was outdated. See, for example, XYY -- Stereotype of the Karyotype (This page, written by a doctor who suspects himself to be an XYY but afraid to check for fear of losing his health insurance, has the agenda of convincing parents not to abort XYY fetuses. He does say, though, that XXYY boys do tend to have lots of problems.)