BIOLOGICAL THEORIES - GENETIC - JACOBS XYY STUDY Flashcards
(9 cards)
what is the main idea?
suggests that criminality can be attributed to a chromosomal abnormality
what are chromosomes?
structures in a cell nuclei that contain our genes
how many chromosomes do XYY males have in comparison to normal?
47 (1 extra)
Sex is determined by…
The pattern of the persons sex chromosomes: XX in women, XY in men
describe the genetic condition
a male has an extra chromosome, occurs in 1/1000 men
Briefly outline jacobs study(1965)
Suggested that men with XYY were more aggressive
how many XYY men are in the average male prison population?
15 per 1000
what was the study based on?
The study from Jacob et al was based on studies of imprisoned criminals, such as those in secure hospitals, where a higher-than-average proportion of inmates were found to have XYY syndrome. Many had histories of aggression and violent assault.
what did price and whitmore argue?
that XYY males tend to be immature and unstable with a tendency to commit motiveless property crimes.
