Twin Studies Flashcards
(13 cards)
Define monozygotic
Identical twins
Define dizygotic twins
Non-identical twins
Define concordance
In agreement or Harmony
What does twin study support
Connotation that a heritable trait may increase risk of criminal behaviour
Why are identical twins monozygotic
Cause they’re fertilised in same egg and share 100% same dna
Why are some twins dizygotic
There from two separate eggs and share 50% of same dna
What is the concordance in relation to twins
When both twins share a characteristic
How is nature v nurture debate assessed
Through win studies to see role of genetic and environmental influences
What has the evidence suggested
Genetic or nature may play a role in criminality to extent that concordance in monozygotic is greater than dizygotic twin
What is an examples of twin studies
Christiansen
What did Christiansen study
4,000 twin in Paairs from danish island
What did Christiansen find
Cocncordence rates of 35% for monozygotic and 13% Dizygotic twins
What is twin study and example of
Genetic theory
