The digital dermatoglyphic pattern of digit 3, digit 4 and digit 5 of the left hand showed a statistically significant relationship between left- and right-handed people.
For each terminal digit 0 to 9, the pattern of digit preference (or aversion) using digit-specific modified Whipple's indices (W i ) is shown in Fig. 2 for women in the reproductive lifespan.
Further investigations into a subset of strains studied here using substantially larger samples will tell us whether this pattern of digit ratios is in fact the case.
Behaviorally, disruption of AIP was also associated with a relative loss of the grasp-specific pattern of digit muscle activity.
Women with the more 'feminine' pattern of digit length (2D : 4D high – ring finger closer in length or shorter than the index finger) were also more likely to present at a younger age (Manning and Bundred, 2000).
For example, localized sonic hedgehog (SHH) expression is critical for defining anterior-posterior patterning of digits in the limb (10) and dorsoventral patterning in the spinal cord (50).
The letter π represents the number 3.14159265…, an irrational number that has neither a final digit nor a discernible pattern of repeating digits.
Together, the results change the relevance of marsupial syndactyly from being an enigmatic phylogenetic character within marsupials to a rare transformation of digit morphology whose molecular background has the potential to provide important insights into the patterns of digit evolution.
