A biological predisposition may result from an atypical endogenous opioid system.

If gender identification is an innate biological predisposition, then we will naturally veer towards gender-specific toys.

The atypical opioid system in mice may be representative of that in anorexia nervosa patients, causing the biological predisposition.

New research into anorexia nervosa has found people are born with a biological predisposition to developing the eating disorder.

It may surprise you to know that we aren't born with a biological predisposition to wash socks and scrub toilets.

"Behavior is often driven by biological predisposition."