Isaac Is a Teenager Who Has a Very Difficult Relationship

Multiple Choice

Isaac is a teenager who has a very difficult relationship with his father. One day he is talking to his girlfriend, Chloie, and he says, "I swear I am never going to be anything like that man when I get older!" Chloie knows about the research in personality and heritability, and smiles as she remembers that about __________% of our adult personality is directly linked to the contribution of genetics.

A) 85
B) 60
C) 40
D) 5