How Much of Your Personality Is Encoded in Your DNA?

Based on genetic studies, scientists estimate that 30% to 60% of your personality is inheritable. Research also suggests that significant personality changes tend to occur between ages 20 to 40.

Were you born this way, or are you a byproduct of your environment? The notion of nature versus nurture is an enduring debate that so far, no scientist or philosopher has been able to definitively answer.

While some…