In a Quantitative Genetic Analysis of Personality Traits Among Monozygotic

Multiple Choice

In a quantitative genetic analysis of personality traits among monozygotic twins,it was found that:
1) Genetic differences play a small role in determining personality traits.
2) Genetic differences play a significant role in determining personality traits.
3) The broad-sense heritability is reasonably high in the 0.34-0.5 range.

A) 1
B) 2
C) 3
D) 1 and 2
E) 2 and 3