Genetic Explanation Of Aggression Flashcards Preview

Psychology - aggression > Genetic Explanation Of Aggression > Flashcards

Flashcards in Genetic Explanation Of Aggression Deck (16)
Loading flashcards...
1

How do genes influence testosterone?

They influence how much testosterone is produced and the number and sensitivity of the receptors

2

Which gene is thought to influence activity of neurotransmitters associated with aggression?

MAOA

3

What does MAOA regulate?

Enzyme in the brain responsible for breaking down neurotransmitters

4

What is the breakdown of neurotransmitters thought to be responsible for?

Maintaining a stable mood

5

What extra chromosome do some aggressive males have?

Extra Y sex chromosome

6

What happens if MAOA is not functioning properly?

Neurotransmitters not properly broken down so respond in an excessive and aggressive way to stress

7

Who did research into the genetic explanation of aggression?

Cases et al, Jacobs et al, gottesman and shields, Brunner et al

8

What did cases et al do?

Genetically modified nice to lack MAOA

9

What did cases et al find?

Altered serotonin level and behaviour as the mice showed increase in aggression including during mating

10

What did Jacobs et al find?

XYY chromosome present in 3% population of inmates compared to 0.1% in general population

11

What did Gottesman and Shields do?

Found concordance rate of aggression of 87% in identical twins and 72% in non identical

12

What did Brunner et al find out about the Dutch family with the mutated MAOA?

All had borderline retardation and shower increased aggression when angry and fearful

13

Evaluation points of genetic explanation...

Too simplistic, deterministic, animal research & methodological issues of twin studies

14

What does the genetic explanation suggest?

Genes influence aggression e.g mutated MAOA and XYY chromosome

15

What's an OTOH for deterministic?

If you know that genetics influences aggression you can aim to predict and intervene

16

What are the methodological issues of twin studies?

Identical twins usually share very similar environment (e.g role models, education, social class) & treated similarly