XYY syndrome
- Created by: bellafereti
- Created on: 17-11-21 19:40
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- XYY Syndrome
- description
- a very small popularion of males are born with the extra 'Y' chromosome (1/1000) - has no effect on testosterone levels or sexual development
- defying characteristics = physically :generally taller and have a lower intelligence emotionally: can be impulsive and experience behavioural difficulties, easily distracted
- Male exclusive
- Jacob et al (1965) suggested there was an over representation of XYY men in prison due to aggressive behaviours
- Weaknesses
- Stockholm (2012)
- conducted a study involving 161 males with XYY syndrome that there was a significant increase in the amount of crimes compared to XY controls - increase was seen in all crimes apart from drug and traffic related crimes
- Issues: when stockholm controlled for factors - education, fatherhood and relationships he found the differences were very small (apart from arson and sexual abuse - these linked to poor development of the pre-frontal cortex in other studies
- Concluded: raised risk of offending by XYY males was due to socio economic conditions that were related to other syndromes (the additional Y chromosome was not the direct cause of criminal behaviour)
- unlikely to know true prevelance extent of XYY as its not practical to look at all genes of offenders
- does account for femal criminals
- Stockholm (2012)
- description
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