WJEC criminology unit 2 summary

Jacob’s XYY theory: 

-        Males have an extra Y chromosome making them more aggressive so criminality could come from this.

-        Large amount of men in prison that have this (15 per 1000 In prison)

-        However genetic abnormality is widespread

-        John Wayne Gacy is an American serial killer (33+ killed) who had this

Twin studies:

-        Monozygotic twins are more likely to develop criminal behaviour and commit crime…