Twin studies

Question 1

Dizygotic twins

Answer 1

DZ twins develop from two eggs and share around half their genetics.

Question 2

Monozygotic twins

Answer 2

MZ twins develop from a single egg so share all of their genetic material.

Question 3

Lange Study

Answer 3

Lange took 30 pairs of twins (same sex).
17 DZ
13 MZ
At least one of the twins were known to have committed a crime.

Question 4

Lange study findings

Answer 4

He found that 10/13 MZ twins were both criminals compared to only 2 DZ twins.
Further studies have shown that if one twin taking part in criminal activity the other twin was 50% more likely to be a criminal in MZ twins compared to 20% in DZ twins.