Final answer:
The heritability of the Big Five personality traits is substantial, with studies indicating that many of these traits have a heritability ratio of more than 0.50.
Step-by-step explanation:
The heritability of Five Factor Model (FFM) traits, also known as the Big Five personality factors, has been a subject of research in behavioral genetics. In the landmark study by Jang, Livesley, & Vernon (1996), it was found that these personality traits have substantial genetic components. The Big Five factors, which include openness to experience, conscientiousness, extroversion, agreeableness, and neuroticism, often referred to with the mnemonic OCEAN, demonstrate a significant hereditary influence. Research indicates that some personality traits have a heritability ratio of more than 0.50, implying a strong genetic contribution, although environmental factors also play a key role.