Digit Length May Reveal Unusual Breeding Behaviour In A Seabird

The hormonal environment experienced during prenatal development may affect adult phenotype and behavior. Digit lengths may provide an estimate of steroid levels encountered during embryonic development in humans and other vertebrates. Finger patterns in humans, specifically 2D:4D finger ratios, have been shown to reveal sexual orientation or cooperative behavior.

More: continued here

Filed under: Biology on July 26th, 2008