• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Examine Genetic Explanations for Aggression

Extracts from this document...


´╗┐Genetics Genetic explanations of aggression suggest that its genes that have a large impact on aggressive behaviour. A lot of studies have been conducted on monozygotic twins (MZ) who share the same genes or dizygotic twins (DZ) who don?t. Christianson conducted research with MZ and DZ twins finding that MZ twins had a higher concordance rate for criminality than DZ twins. Concluding that genes do have an impact on aggression and MZ twins are likely to show aggressive behaviour if another does. Supporting research was conducted by McGuffin. They found similar results to Christianson and found that MZ twins had higher concordance rates than DZ twins. This supports the claim that twins that share genes are more likely to both show aggressive behaviour. However both studies never showed 100% concordance rates which means that there must be other factors that contribute to aggression. ...read more.


This proves that it is genes that have the main influence of aggression not as much as the environment. Supporting research was conducted by Holfling which showed similar results. They also found that biological parents who showed aggression were more likely to have a child with similar behaviour than an adopted parent. This provides support that it is biological factors that mainly influence aggression. Another positive of these findings is that it does research within the nature/nurture debate. Adoption studies look at the environment at adopted house but also the biology of the biological parents. Therefore, these findings are very valid and useful and it?s easy to conclude that genes are the factor that impact aggression. An alternative explanation was provided by Sandburg on XYY karyotype genes. They studies men who had the standard XY gene and those who had an extra Y gene and compared them for aggressive behaviour. ...read more.


Therefore, it doesn?t account for all factors that could contribute to aggression. The approach is also deterministic. This is because it fails to consider free will. Not everyone shows aggression and therefore they have the free will to no be aggressive which this approach fails to consider. Also, although adoption studies look at both, the approach favours nature rather than nurture. The biological approach only looks at biology and genes and no other factors like the environment which could also influence aggression. In conclusion, the biological approach provides a clear explanation to how genes impact someone showing aggressive behaviour. However, it doesn?t only focuses on genes and no other approaches such as social. For instance, Bandura?s social learning theory suggests that aggression is caused not only by inherited factors but also environmental factors such as reproduction which is copying (aggressive) behaviour you have witnessed. Therefore, this approach doesn?t show aggression as a whole. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Physiological Psychology section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Physiological Psychology essays

  1. Sleep and Biological Rhythms revision

    * Important to distinguish between primary and secondary for treatment purposes. However, often precedes mood disorders, therefore treat regardless of primary or secondary effects * Speilmen - predisposing (50% cc for insomnia), this doesn't explain chronic primary insomnia so, predicating vulnerability (risk factors)

  2. Discuss genetic explanations of aggression

    The relationship between ADHD and aggressive behaviour has been consistently demonstrated in research. Other studies have concentrated on the gene for the dopamine receptor D3. Retz et al (2003) found an association between a variant of the DRD3 gene and both impulsivity and ADHD symptoms in violent offenders.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work